Answer:
The answer is B, by opening sodium channels.
It is time to complete a Discussion-Based Assessment with your instructor. Make sure you have studied and completed all lessons in the module, and then contact your instructor. If you have any questions about the content or assessments from this module, this is a great opportunity to get additional help. During the discussion, your instructor will ask you a few questions related to the material in this module to ensure that you are ready to take the module exam.
To evaluate your learning, your instructor may ask you questions about the following module topics:
science and its methods
tragedy of the commons
ecological footprints and biocapacity
environmental regulation
human impact on cycles
distribution of terrestrial biomes
importance of forest ecosystems
impacts of mining and drilling
sustainable practices in urban development
impacts of urbanization
impacts of waste disposal
sustainability of land resources
Vocabulary Check
Check your knowledge of the new vocabulary you learned in this module. Use the vocabulary in the word bank below to fill in the blanks of the sentences.
biocapacity
climate
dependent variable
exploitation
habitat fragmentation
heat islands
reclamation
transpiration
urban sprawl
Rainforests are dwindling due to the ________ of their resources.
Deforestation can lead to ________, which reduces the territory of migrating animals.
Biomes are often classified by their geographic location or __________.
Cities become __________ because the roads, sidewalks, and concrete buildings make them warmer than the surrounding trees and vegetation.
During an experiment, the ______________ reacts to a change in the independent variable.
After mining, companies backfill mines and reestablish habitat in a process called ____________.
A farmer can increase the ___________ of his land, making more food per acre, using sustainable practices.
Cities expand beyond their boundaries as population grows, creating _________ with surburbs and housing outside city limits.
Answer:
Rainforests are dwindling due to the exploitation of their resources.
Deforestation can lead to habitat fragmentation, which reduces the territory of migrating animals.
Biomes are often classified by their geographic location or climate.
Cities become urban heat islands because the roads, sidewalks, and concrete buildings make them warmer than the surrounding trees and vegetation.
During an experiment, the dependent variable reacts to a change in the independent variable.
After mining, companies backfill mines and reestablish habitat in a process called reclamation.
A farmer can increase the productivity of his land, making more food per acre, using sustainable practices.
Cities expand beyond their boundaries as population grows, creating sprawl with suburbs and housing outside city limits.
Fill in the blanks :
1. Rainforests are dwindling due to the exploitation of their resources.
2. Deforestation can lead to habitat fragmentation, which reduces the territory of migrating animals.
3. Biomes are often classified by their geographic location or climate.
4. Cities become heat islands because the roads, sidewalks, and concrete buildings make them warmer than the surrounding trees and vegetation.
5. During an experiment, the dependent variable reacts to a change in the independent variable.
6. After mining, companies backfill mines and reestablish habitat in a process called reclamation.
7. A farmer can increase the biocapacity of his land, making more food per acre, using sustainable practices.
8. Cities expand beyond their boundaries as population grows, creating urban sprawl with suburbs and housing outside city limits.
What is Deforestation?Deforestation is the clearing or removal of forests or trees from a significant area, often causing environmental damage. Many factors such as agriculture, urbanization, logging and mining can contribute to deforestation.
This can result in a number of environmental issues, including soil erosion, climate change, loss of biodiversity, and water cycle disruption. Deforestation can have serious detrimental effects on the economy as well as the ecology.
Therefore, the correct blanks for 1, 2, 3, 4, 5, 6, 7 and 8 are exploitation, habitat fragmentation, climate, heat islands, dependent variable, reclamation, biocapacity and urban sprawl respectively.
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What data are necessary to determine the carrying capacity of ferrets in an area of a given size?
At each time step, the carrying capacity (K) of the black-footed ferret population in the Conata Basin was determined to be 1/766 of the PD population size.
Why did ferret removal have such a significant impact on the ecology of the prairie?Due to their assistance in controlling prairie dog populations, ferrets are important indicators of good ecosystems. Larger predators like owls, coyotes, and badgers eat the ferrets themselves. As predators and prey on the prairie, they are crucial components of the ecology.
What is a black-footed ferret fact sheet?The weasel family includes black-footed ferrets, which are comparable in size to minks. Adults are 18 to 24 inches long and weigh less than three pounds
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If the pea plant has two alleles (yy) for seed color, it would be considered:_____. a. homozygous dominantb. homozygous recessive c. heterozygous dominant d. heterozygous recessive
Answer: The answer is A
Explanation: Trust me bro.
Glucose is the preferred carbon source for Escherichia coli bacteria. Researchers isolated E coli, a strain of E coli with a single mutation that inactices a key enz
study the effect of the mutation on glucose utilization and ATP production by the bacteria, the researchers add 2 10% E colibacteria to 400 mL of a growth
as a measure of the bacterial concentration over time
(a) Describe why monitoring the growth rate of the E coli bacteria is a useful indicator of the effect of the glycolytic enzyme mutation on the bacteria
The monitoring the growth rate of the E coli bacteria is a useful indicator of the effect of the glycolytic enzyme mutation on the bacteria because movement depends on the carbon availability.
Because the movement of internal metabolic components depends on the availability of carbon, tracking the growth rate of E. coli bacteria is a helpful way to determine the impact of glycotic enzyme mutation on the bacterium. Hence, the glyclyotic enzyme mutation might shift up or down depending on the change in carbon supply.
The researchers can test whether mutation impacts the growth rate of E.Colin-M bacteria using a technique called continuous culture.
The development of the bacteria will be reduced without impairing its central metabolism if the growth media has a greater quantity of acetate.
E. coli produces acetate as it develops. Overflow mechanism is the name of this device. Acetate growth inhibition is primarily caused by regulatory interactions that are mediated by acetyl-phosphate.
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Suggest two ways in which teenagers could balance their pursuit of personal gaol and social relationships
Teenagers may balance their social interactions and personal ambitions by being aware and maintaining a healthy lifestyle. Explanation: Work, lifestyle, and family goals are examples of personal objectives that are motivating.
What does the strength of perseverance entail?As a result, you are more driven to continue and give your job more meaning. You will accept the idea that there is always a way to accomplish goals. You learn how to give the most important tasks top priority.
The relational models theory outlines the four basic types of social relationships: market pricing, equality matching, authority ranking, and communal sharing. In contrast to outsiders, those who are in communal sharing relationships believe they have something fundamental in common.
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You see a train outside your window that travels 24 km in 0.50 h. Its average speed is
Answer:
48 km/h
Explanation:
To find speed we have to use the equation: [tex]speed = \frac{distance}{time}[/tex]
Where distance is in km (kilometers) and time is in h (hours)
To solve this all we need to do is plug the values we are given into the correct slots in the equation:
[tex]speed = \frac{24}{0.5}[/tex]= 48 km.hTOP TIP:
When doing a maths question always make sure that the units line up with the information you are given!
Hope this helps, have a lovely day! :)
The answer to this question
Answer:
Option A: 1/11
Explanation:
Northern China experienced drought and southern China had floods in 1997
following warmer-than-average water temperatures in the eastern Pacific
Ocean. What likely caused these weather events?
O A. La Niña
• B. An occluded front
• c. The jet stream
O D. EI Niño
Answer:
The answer is D, El Niño.
Explanation:
The weather events of drought in northern China and floods in southern China in 1997 were likely caused by D. El Niño, which is characterized by warmer-than-average water temperatures in the eastern Pacific Ocean.
2. How do seedless vascular plants that exist today differ from those during the Devonian and Carboniferous periods?
Seedless vascular plants that exist today differ from those during the Devonian and Carboniferous periods in several ways.
During the Devonian and Carboniferous periods, seedless vascular plants such as ferns and horsetails were much more diverse and dominant than they are today, and they played a significant role in shaping the landscape and ecosystem of the time. These ancient seedless vascular plants grew to much larger sizes than their modern counterparts, with some species growing up to 30 meters tall.
Today's seedless vascular plants, on the other hand, are generally smaller and less diverse than those of the past. They include ferns, horsetails, and clubmosses, and they play a less significant role in shaping the landscape and ecosystem. One major difference between modern and ancient seedless vascular plants is that ancient plants reproduced primarily by spores, while modern plants can also reproduce by vegetative propagation or through other means.
Additionally, modern seedless vascular plants are adapted to different environmental conditions than those of the Devonian and Carboniferous periods, and they exhibit a range of morphological and physiological adaptations that reflect these differences.
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A map of the world is shown.
Click on the areas most likely to experience hurricanes, typhoons, or tropical cyclones.
Select THREE areas by clicking on the map. Selected answers appear shaded.
Tropical storms usually have diameters of between 100 and 2,000 km (62 and 1,243 mi). Tropical storms hit a number of places around the world every year, including the Gulf Coast of North America, Australia, India, and Bangladesh.
What is a tropical cyclone?An powerful circular storm with a tropical genesis develops over warm tropical seas. Typhoon or a storm are other names for it. Low air pressure, a lot of rain, and gusts that are faster than 119 km/h (74 mph) define it.
Every year, tropical storms form in the late summer, from July to September in the Northern Hemisphere and from January to March in the Southern. Tropical Depression, Tropical Cyclone, Typhoon, and Super Typhoon are the different categories.
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The cerebral cortex is
located at the base of the skull and
responsible for regulating the body's vital
functions.
made up of neural structures in the center of
the cerebrum, regulating the
body's movements.
a thin layer of gray tissue responsible for
thinking, movement, and processing
sensory information.
DONE
Answer:
a thin layer of gray tissue responsible for thinking, movement, and processing sensory information.
Explanation:
Natural Selection on Polygenic Traits In most populations, a trait that has higher fitness leads to greater numbers of organisms with that trait. On the graphs below, dotted lines show the original population. The solid lines show the population after selection has taken place.
Polygenic trait natural selection Genetic changes that are advantageous to a person's survival are often handed on through reproduction in most populations.
What is a polygenic trait's natural selection?The dispersion of phenotypes can be impacted by natural processes on polygenic features in three different ways: direct selection, stable selection, or disrupting selection. Success in transferring genes to the following generation is what is known as evolutionary fitness.
Does natural selection produce more fit people?Natural selection influences the level of biological features in a population, favoring those with higher evolutionary fitness. A person who is highly evolutionary fit will make more advantageous contributions to a gene pool of the following generation.
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How does the male body ensure that the sperm cell are not killed by acidic urine
The male body has several mechanisms to ensure that sperm cells are not killed by acidic urine. One of the main mechanisms is the secretion of alkaline fluids into the urethra during ejaculation.
The prostate gland and seminal vesicles produce alkaline fluids that help to neutralize the acidic environment of the urethra and female reproductive tract, which can be harmful to sperm cells. In addition to the alkaline fluids, the male body also has a protective mucus layer in the urethra that helps to shield the sperm from the acidic urine. The mucus layer is produced by the urethral glands and helps to reduce the exposure of the sperm cells to the acidic environment. Furthermore, the male body also has a mechanism called the urethral reflex, which is a contraction of the muscles in the urethra that occurs during ejaculation. This reflex helps to push out any residual urine in the urethra and helps to minimize the exposure of the sperm to acidic urine. Overall, the male body employs several mechanisms to ensure that sperm cells are protected from the harmful effects of acidic urine and that they can successfully fertilize the female egg.
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The ADP-ATP cycle is critical to producing cell energy. What do you know about this cycle?
On average, 34-36 molecules of ATP are gained through the process of aerobic cellular respiration from one glucose molecule.
When phosphate is added to ADP, free energy from food sources is stored in the phosphate bond, producing ATP.
The hydrolysis of ATP to ADP is reversible.
When a phosphate group is removed from ATP by hydrolysis, ADP is produced and energy is stored for cellular processes.
Only aerobic cellular respiration is used to break down glucose into ATP that is usable by the cell.
Glycolysis is the first step in both aerobic and anaerobic cellular respiration.
It can be multiple answers
The ADP-ATP cycle is critical to producing cell energy. Option a, b, c, d, and f are correct regarding this cycle.
The ADP-ATP cycle is a process that continuously occurs in all living cells and is critical for producing cellular energy. The cycle involves the interconversion of ATP (adenosine triphosphate) and ADP (adenosine diphosphate) through the addition or removal of a phosphate group.
When a phosphate group is added to ADP by the enzyme ATP synthase, it forms ATP. The energy required for this reaction comes from the breakdown of food molecules such as glucose during cellular respiration. This reaction is known as phosphorylation.
On the other hand, when a phosphate group is removed from ATP by the enzyme ATPase, it forms ADP, releasing energy that can be used by the cell for various metabolic processes. This reaction is known as dephosphorylation. The hydrolysis of ATP to ADP is a reversible reaction, which means that ATP can be regenerated from ADP and inorganic phosphate when needed.
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The Beadle and Tatum experiments were based on all of the following assumptions except that. Supplemented media permit growth of auxotrophic strains of Nourospora X-irradiation can induce mutations. Two strains of auxotrophic Nourospora that grow on minimal medium supplemented with biotin have mutations in the same gene auxotrophs fail to grow on minimal media In their first round of screening. Boodle and Tatum plated spores on minimal medium. The purpose of this screen was to. Identify which mutants were deficient in vitamin synthesis pathways and which were deficient in amino acid synthesis pathways determine which of the mutants generated were auxotrophic for thiamine. Determine whether any auxotrophic mutants had been generated eliminate all nonmutant Neurospora from the population
Answer:
Relationships where both organisms benefit are called mutualism.
A.
True
B.
False
Aiden’s father is hospitalized suddenly with heart pain. The doctor diagnoses him with cardiovascular disease and advises surgery. Aiden hears his dad tell the doctor that his own father struggled with the condition as well. Considering this information, which statement BEST defines what this means for Aiden?
Group of answer choices
Aiden will end up with cardiovascular disease because it’s genetic.
Aiden does not need to worry about cardiovascular disease in the future.
Aiden may be more vulnerable to cardiovascular disease in his lifetime.
Aiden already has cardiovascular disease that hasn’t been diagnosed.
Answer: Aiden may be more vulnerable to cardiovascular disease in his lifetime
Explanation: Genetics is not always defiant therefore choice one does not work.
Aiden does need to worry about cardiovascular disease because it is genetic in his timeline. His father and his grandfather both have it.
Aiden is more vulnerable to cardiovascular disease because it is in his genes
Choice 4 is to big of a conclusion to make based off the information given
Single-cell recording studies have indicated that the _______ may be especially important in the control of internally guided motor sequences, whereas the _______ may be especially important in the control of externally guided motor sequences.Select one:a. supplementary motor cortex ; premotor cortexb. premotor cortex ; supplementary motor cortexc. basal ganglia ; cerebellumd. cerebellum ; basal ganglia
Single-cell recording studies have indicated that the supplementary motor cortex may be especially important in the control of internally guided motor sequences, whereas the premotor cortex may be especially important in the control of externally guided motor sequences. The correct answer is a. supplementary motor cortex ; premotor cortex.
The supplementary motor cortex is involved in the planning and execution of complex motor sequences that are guided by internal cues or memories.
The premotor cortex, on the other hand, is involved in the planning and execution of motor sequences that are guided by external cues or stimuli. These two areas of the brain work together to control our movements and allow us to perform complex motor tasks.
The frontal lobe's SMA and premotor cortex play a role in the organisation and beginning of voluntary motor motions. The SMA and premotor cortex are active in conjunction with the basal ganglia during beat-based timing and beat perception.
Therefore The correct answer is a. supplementary motor cortex ; premotor cortex.
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While the signals given by males can indicate their quality, could they also be detrimental to the males? How?
Surely, as male signals can act as signs of a guy's quality, they may also serve as a male's harm. as a fact that a male can find to female in a special ways. It didn't pick a widowbird if a female reject a male.
Widowbird's significance is unclear.Any of numerous species of birds as in family Viduidae, including whydahs and widow finches, are referred to as widow birds (plural: widow birds).
Why is a bird used as a Native American symbol?The belief that everything has innate goodness, strength, and wisdom is prevalent in Native American culture. An powerful symbol that denotes honor and a bond between the bearer, the Creator, or the bird from whom the feather originated is the feather.
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How does the relative distance and length of year of outer planets compare with those of inner planets?
When compared with inner planets, the outer planets are relatively farther from the sun and have a longer year.
When compared with inner planets, the outer planets are relatively farther from the sun and have a shorter year.
The outer planets are relatively closer to the sun and have a longer year than the inner planets.
The outer planets are relatively closer to the sun and have a shorter year than the inner planets.
Answer:
The outer planets are relatively closer to the sun and have a longer year than the inner planets.
Oliver notices a flower growing in his front flowerbed. It is one he has never seen
before, and he knows he didn’t plant this flower. Flowering plants have developed ways
to disperse seeds in different ways for a reason. Describe two ways seeds are
dispersed, and explain why it is important for them to be spread in different places
Some feature a parachute-like structure to keep them aloft. Certain fruits—like the dandelion, for instance—have hairy, weightless structures that are ideal for wind dissemination.
Fruit that is light and buoyant has seeds that are spread by water, which allows them to float. The five primary means of dispersing seeds are gravity, wind, ballistics, water, and animal transport. in the Plants with spines or hairs are shaded and their leaves or stems are protected from drying winds. Desert plants have evolved their roots as well in order to survive. Some plants have extensive, shallow roots that may take in a lot of moisture from rainfall. Some have deep taproots that can get subsurface water.
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Discuss climate change as an important and topical issue today. After reading and watching the materials here, what do you think? Do you agree? What actions are you willing to take to help address the concerns? Post a detailed response to the Climate Change Discussion prompt.
Climate change is a pressing issue that is affecting our planet in numerous ways. The evidence clearly shows that the Earth's climate is changing, and that human activities, such as burning fossil fuels and deforestation, are the primary cause
How these activities release large amounts of greenhouse gases and affects climclimate change?
These activities release large amounts of greenhouse gases into the atmosphere, which trap heat and cause the planet to warm up.
The effects of climate change are already being felt around the world, including rising sea levels, more frequent and severe weather events, and shifts in ecosystems and agricultural productivity. Climate change is also exacerbating social and economic inequalities, particularly for marginalized communities.
We need to encourage individuals and governments to take steps to reduce greenhouse gas emissions and mitigate the effects of climate change. This includes transitioning to clean energy sources, such as solar and wind power, reducing consumption of meat and dairy, supporting policies that prioritize sustainable land use and conservation, and investing in climate resilience measures.
Ultimately, it is up to all of us to take responsibility for our own carbon footprint and make choices that support a sustainable future. We must work together to address the challenges posed by climate change and ensure a livable planet for future generations.
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The machine is making less liquid oxygen than normal. What is wrong?
A) There was frozen water in tank 2, which is blocking some of the oxygen from going into tank 3
B) Some of the liquid oxygen evaporated in tank 3
C) Some of the oxygen didn't condense in tank 2
The machine is making less liquid oxygen than normal, and there could be several reasons for this. One possibility is that some of the oxygen didn't condense in tank 2. Here option C is the correct answer.
In a typical oxygen production process, the air is compressed and cooled to a very low temperature, causing it to condense into a liquid. This liquid air is then separated into its component gases, such as oxygen and nitrogen, using a distillation process.
If some of the oxygen doesn't condense in tank 2, it can result in less oxygen being available for further processing, leading to a reduction in the amount of liquid oxygen produced. Possible reasons for oxygen not condensing in tank 2 could be an issue with the cooling system, a problem with the insulation, or a malfunction in the distillation process.
While frozen water in tank 2 or evaporation of liquid oxygen in tank 3 could also potentially cause a reduction in the amount of liquid oxygen produced, the most likely cause in this scenario is that some of the oxygen didn't condense in tank 2.
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DNA is located in the
nucleus
organelles
membrane
ribosomes
of a cell. Which one ??
Answer: The Nucleus
Explanation:
The genetic material, or DNA, of the cell is located in the nucleus, which also serves as the location of ribosome synthesis, the process by which cells put together proteins.
The near point (the smallest distance at which an object can be seen clearly) and the far point (the largest distance at which an object can be seen clearly) are measured for six different people. Near point (cm) far point (cm) avishka 40 [infinity] berenice 30 300 chadwick 25 500 danya 25 [infinity] edouard 80 200 francesca 50 [infinity]
The people with farsightedness ranked by the power of the lens required to correct their hyperopic vision from largest to smallest are Berenice, Avishka, Francesca, and Edouard.
Hyperopia, or farsightedness, is a refractive error where the eye is unable to focus on nearby objects. It can be corrected with a converging lens that refracts light to focus it onto the retina. The power of the lens required to correct hyperopia is measured in diopters, which is the reciprocal of the focal length of the lens in meters.
From the given data, the people with farsightedness are Berenice, Avishka, Francesca, and Edouard. To rank them by the power of the lens required to correct their hyperopic vision, we need to calculate the strength of the lens required for each person by using the formula:
Lens power (in diopters) = 1 / focal length (in meters)
Using the near and far point data, we can calculate the focal length for each person as:
Berenice: Near point = 30 cm, Far point = 300 cm; Focal length = 1/((1/300)-(1/30)) = 33.3 cm; Lens power = 1/0.333 = 3 diopters
Avishka: Near point = 40 cm, Far point = [infinity]; Focal length = 1/((1/40)-(0)) = 40 cm; Lens power = 1/0.4 = 2.5 diopters
Francesca: Near point = 50 cm, Far point = [infinity]; Focal length = 1/((1/50)-(0)) = 50 cm; Lens power = 1/0.5 = 2 diopters
Edouard: Near point = 80 cm, Far point = 200 cm; Focal length = 1/((1/200)-(1/80)) = 57.1 cm; Lens power = 1/0.571 = 1.75 diopters
Complete question:
The near point (the smallest distance at which an object can be seen clearly) and the far point (the largest distance at which an object can be seen clearly) are measured by six different people.
Near Point(cm) Far Point(cm)
Avishka 40 [infinity]
Berenice 30 300
Chadwick 25 500
Danya 25 [infinity]
Edouard 80 200
Francesca 50 [infinity]
Of the farsighted people, rank them by the power of the lens needed to correct their hyperopic vision. Rank these from largest to smallest power required.
1. Berenice
2. Avishka
3. Francesca
4. Edouard
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PLease help need done now!!!
In both prokaryotic and eukaryotic species, DNA replication begins prior to the initiation of cell division. DNA replication is a scientific process that produces two identical DNA copies from a single strand of DNA.
How is DNA replication in prokaryotes and eukaryotes?
DNA replication is the initial stage in prokaryotic cell division, which occurs largely by binary fission or budding. Cell division is a somewhat complicated process in eukaryotes, and DNA replication occurs during the synthesis (S) phase of the cell cycle.
Since prokaryotic DNA has only one strand of circular DNA, two replication forks arise. In eukaryotic cells, around 3500 forks arise because there is significantly more DNA that has to be copied.
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Explain why milk lasts longer in a fridge. (rather than left outside in room temperature).
Homologous structures are body structures that....
a, used for the same purpose.
b, come from a common ancester.
c, are mutations.
d, are exactly the same and used for the same function no matter what species they are found in
Answer: b, come from a common ancestor.
Explanation:
Homologous structures are body structures found in different species with similar structures, indicating a shared evolutionary history. These structures may have different functions in different species but share a similar underlying structure. Examples of homologous structures include the bones in the forelimbs of vertebrates, which have alike arrangements and structures despite being used for different purposes (e.g., wings in birds, arms in humans, and flippers in whales).
which shape of prokaryotic cell normally does not exist as one single cell, but is instead found in groups of cells with specific names based on their arrangement? multiple choice rod-shaped (bacilli) spherical (coccus) spiral (spirochetes)
The shape of prokaryotic cell that normally does not exist as one single cell, but is instead found in groups of cells with specific names based on their arrangement is the spiral (spirochetes). The rod-shaped (bacilli) and spherical (coccus) prokaryotic cells are usually found as single cells.
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In the Pacific Northwest a red fox has a circular home range with a radius of about 718 meters. To the nearest whole number, about how many square
meters are in a red fox's home range?
About _____m2
The approximate area of the red fox's home range is 1,623,207 m².
The area of a circle is given by the formula A = πr², where r is the radius of the circle. In this case, the radius of the red fox's home range is 718 meters. Therefore, the area of the home range is:
A = π(718 m)² = 1,623,207 m²
Rounding to the nearest whole number, the approximate area of the red fox's home range is 1,623,207 m².
What is the relation between area and perimeter of a circle?The area and perimeter (or circumference) of a circle are related by the circle's radius (r) or diameter (d).
The area of a circle is given by the formula A = πr² or A = π(d/2)², where π (pi) is a mathematical constant approximately equal to 3.14159.
The perimeter (or circumference) of a circle is given by the formula P = 2πr or P = πd, where P is the perimeter (or circumference) of the circle.
From these formulas, we can see that the area of a circle is proportional to the square of its radius, while the perimeter (or circumference) of a circle is directly proportional to its radius (or diameter).
Therefore, if the radius (or diameter) of a circle is increased by a factor of k, then its area will increase by a factor of k², while its perimeter (or circumference) will increase by a factor of k.
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Explain why it is so important for the cell membrane to be fluid
Answer:
Hi! The answer is Because the membrane is fluid and not rigid, these proteins can move within the membrane and when the cell grows and enlarges, the membrane also increases in size and maintains that to allow this growth to proceed nicely .
Explanation:
I hope this helps
The fluidity of a membrane is how stuff or flexible. Butter is a good analogy. Right out of the refrigerator, it's very still. If you leave it on the counter at 25-30 degree C, it gets soft. Heat is more and it melts. It isn't a crystal structure like water/ice, so it transitions between stiff and soft before it totally melts.
The membrane is like this too. Fluidity is important to maintain the function of membrane functions - too stiff or too loose and they won't function properly. When a person inhales an anesthetic (like ether, nitric oxide, or halothane), the small non-polar molecules dissolve in the middle, non-polar part of the membrane. This disrupts the interaction between the fatty acids tails and makes the membrane very loose - disorganized. The membrane proteins in the brain (ion channels) stop working and the brain shuts down. This is how inhalation anesthetics work.
Cells maintain the proper membrane fluidity by using the correct fatty acids in the phospholipids. Longer chains increase fluidity. And cholesterol does both - it increases fluidity at lows temps and decreases fluidity at high temps. It controlled by the cell. Typically, in warm-blooded species, the membrane composition doesn't change much because the temperature is constant. But in ecothermic species, the cell will change the membrane composition to meet the temperature and keep fluidity constant as temperature changes.
Thank you,
Eddie E.