An man about 80 years old, lives alone. He looks very weak and undernourished. His lower limbs bones are tender and thin. Due to poor diet and loneliness, he lacks the essential vitamins and minerals for his bone formation. Explain bone formation (ossification) , and bone marrow formation which this man is lacking.​

Answers

Answer 1

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All bone formation is a replacement process. During development, tissues are replaced by bone during the ossification process. In intramembranous ossification, bone develops directly from sheets of mesenchymal connective tissue. In endochondral ossification, bone develops by replacing hyaline cartilage, bone formation, also called ossification, process by which new bone is produced. ... Soon after the osteoid is laid down, inorganic salts are deposited in it to form the hardened material recognized as mineralized bone. The cartilage cells die out and are replaced by osteoblasts clustered in ossification centres.

Hope it helps you


Related Questions

what is the cytoplasm job in the factory?

Answers

Answer:

factory floor!

Explanation:

function:

Contains the organelles; site of most cell activity.

Which RNA molecule is involved in translating a short sequence of RNA into an amino acid, acting like a molecular Rosetta stone?
a
snRNA

b
tRNA

c
mRNA

d
rRNA

Answers

Given what we know about the translation process, we can confirm that the RNA in question that aids in the process of translating a short sequence of RNA into an amino acid is mRNA.

mRNA is referred to as messenger RNA. This RNA molecule acts as just that, a messenger carrying the necessary code to create amino acids and therefore, proteins. This messenger binds itself to the ribosomes of a cell, which are in charge of reading the code, one codon at a time, and chaining together the corresponding amino acids.

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The state of Georgia has a yearly energy surplus.

Question 8 options:
a) True
b) False

Answers

Answer: A

Explanation:

True state of Georgia has a yearly energy surplus.

Does Georgia use more energy than it generates?

Georgia is among the top 10 electricity-producing states, the state typically uses more power than it generates.

What energy source does Georgia use?

Nearly 75% of Georgia's electricity generation comes from hydro production (75.3% in 2019), with the remainder produced from natural gas and from a 20.7 MW wind power plant .

Hence, correct option is :True

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The movement of the outer core is
important to life because...

Answers

Answer:

he movement causes powerful electric currents to develop in the liquid iron itself.

Explanation:

The carbohydrate molecule ____
is a powerhouse energy source.


A) Glucose

B) sucrose

C) lipid

D) amino acid

Answers

Answer:

The carbohydrate molecule ____ is a powerhouse energy source.

→ A) Glucose

if the superior colliculi were damaged what function would be impaired​

Answers

Answer:Severing the splenium of the corpus callosum, which has to be done to reveal the superior colliculi, had no effect on the movement threshold. But when the superior colliculi were damaged in addition, there was an initial substantial impairment in the detection of movement and a smaller but permanent elevation in the threshold.

Explanation:

Punnet Squares

A couple have 4 children, their first child has blood type A. the second child has blood type O. The third child has blood type AB, and the fourth has blood type B. What are the genotypes of the parents?

Answers

Answer:

a and ab blood types

Explanation:

the ability of a solution to change the shape or tone of the cell

Answers

Answer:

tonicity

Explanation:

this i the ability of a solution to change the shape (tone) of a cell by altering it's internal water volume

Which one of the following fuels directly produces CO2 but is considered carbon neutral?

Question 2 options:

a)

Wind


b)

Biomass


c)

Oil


d)

Coal


e)

Hydropower

Answers

Answer:

A. wind

B. coal

Explanation:

there are two fuels directly produces CO2 but is considered carbon neutral which are wind and coal

Hemolysis is:

O A) when a red blood cell is in a hypertonic solution and the cell ruptures

O B) when a red blood cell is in a hypotonic solution and the cell ruptures

O C) when a red blood cell is in a hypotonic solution and the cell shrinks

O D) when a red blood cell is in a hypertonic solution and the cell shrinks

Answers

A) When a red blood cell is in a hypertonic solution and the cell ruptures

Which of the following examples best describes a disturbance that is likely to result in significant, long-lasting changes to an ecosystem?
Choose 1 answer:
Choose 1 answer:

(Choice A)
A
A frost in late spring kills some of the earliest budding plants and flowers in a field.

(Choice B)
B
Tens of thousands of geese rest for a week at a large lake during their annual migration.

(Choice C)
C
The failure of a 60-year-old beaver dam floods a downstream meadow.

Answers

i would say C. resting isnt really going to change anything, they are still migrating and only SOME of the budding plants were killed not all.

The failure of a 60-year-old beaver dam floods a downstream meadow  best describes a disturbance that is likely to result in significant, long-lasting changes to an ecosystem

It cause immense damage to the property, habitats due to water flooding over them.

What is a dam?A dam is a barrier that stops or restrict the flow of surface water or underground streams.It is build across the stream or river to hold water back.It can used to store water, control floods and generate electricity.

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Examine the model here showing the Milky Way galaxy. Which statements are accurate regarding the galaxy? Select all THREE that
apply.

Answers

Answer:

lame answer

Explanation:

If a man with type AB blood conceives a child with a woman with type O blood, what are their chances of producing a type A baby?

Answers

Answer:

A or B

Explanation:

if bird cannot migrate what it does to survive

Answers

If a bird can not migrate, it must adapt to thrive on foods that are available in different seasons.

Mark and Michelle both have dark hair, which is a dominant trait. But their first child is blonde. Which is the most likely explanation

Answers

Both parents have a recessive blonde allele that got passed on to their child.

Another gene caused the alleles for brown hair to deactivate.

It's not possible--Mark can't be the real father.

One of the two has a blonde allele that is dominant in the child.

Answer:

They are heterozygous for the dark hair.

Which method of timber harvesting removes all trees from the harvest area?

Answers

Clear-cutting is the most common method of timber removal. Clear-cutting removes all the trees in a given area, often by using large machinery. From an economic standpoint, the benefit of this approach is that humans can harvest maximum timber with minimal energy and cost.

How does one distinguish
between the left & right
sides of a heart?

Answers

Answer:

See explanation section for answer:

Explanation:

The left side of the heart contains the left atrium which allows oxygen rich blood to flow through the mitral valve and into the left ventricle. Whereas the right side of the heart contains the right atrium which allows the blood with poor oxygen levels to enter the right ventricle through the tricuspid valve.

Also, the left ventricle is larger than the right ventricle because the left ventricle is responsible for pumping the fresh oxygen rich blood throughout the body.

If a brown-eyed mother and a blue-eyed father have four children, three will probably have brown eyes. What can you conclude from this?

A. Brown eyes are a successive trait
B. Brown eyes are a submissive trait
C. Brown eyes are a recessive trait
D. Brown eyes are a dominant trait

Answers

Answer:

D. Brown eyes are a Dominant Trait

Explanation:

D. brown eyes are dominant trait

A person who has type AB blood:

Answers

Answer:

B-positive (B+): 9%

AB-positive (AB+): 4%

A-positive (A+): 30%

Hey, I need help with this question:

Answers

Answer:

(D) two different species on the basis os reproductive behaviour

BRAINLIST PLS

which of the following can cause polyploidy
A : a single egg fertilized by two sperm
B: a diploid egg being fertilized by a normal sperm
C: a normal egg being fertilized by a diploid sperm
D : all of the above ​

Answers

Explanation:

a polypiody is a condition that has more than 2 sets of chromosomes. common in plants..

what type of stress is placed on a normal fault

Answers

Tensional stress is what’s placed on a normal fault

If each of these food chains start with 10,000 grams of phytoplankton, how much reaches the highest trophic level in each food chain

Answers

Energy is transferred from one trophic level in a food chain to another. However, not all the energy available at a trophic level is transferred to the next.

Only about 10% of the energy in the lower trophic level gets to the immediate higher trophic level and the rest is lost as metabolic heat.

Thus, if a food chain starts with 10,000 grams of phytoplankton, the quantity that will get to the highest trophic level would depend on the number of intermediate trophic levels in between the lowest and the highest.

For every step the energy is transferred up the trophic level in the food chain, 90% of it is lost.

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If you make mutations in the nuclear localization signal of a nuclear protein, what will happen to the protein

Answers

Answer:

What would happen if the operator sequence of the trp operon contained a mutation that prevented the repressor protein from binding to the operator? a. In the absence of tryptophan, the genes trpA-E will not be transcribed. b. In the absence of tryptophan, only genes trpE and trpD will be transcribed. c. In the presence of tryptophan, the genes trpA-E will be transcribed. d. In the presence of tryptophan, the trpE gene will not be transcribed.

Explanation:

Describe a hypothetical result of the fluctuation test that would have supported the hypothesis that mutations occur in response to an environmental challenge, and explain how this result was different from the observed result described above

Answers

In order to support the hypothesis that mutations occur in response to an environmental challenge, the experiment in question would have to show an increase in mutation rates shortly after the environmental challenge was introduced.

When we test a hypothesis, we perform an experiment and gather data over the course of the testing. In order to obtain evidence that supports a hypothesis, we have to ensure that only one variable is changing and be sure to repeat the experiment to confirm the values measured.

Taking this into account, a hypothetical result of the fluctuation test that would support the hypothesis of mutations in reaction to environmental challenges would be to measure a spike in mutation rates in the generation following an environmental challenge, and then continue to do so with future post-challenge generations.

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El acero es homogénea,heterogénea,elemento,compuesto?

Answers

Answer:

El acero es una mezcla homogénea, sin embargo, está hecho de hierro y carbono. Una sustancia pura es diferente de una mezcla homogénea porque una sustancia pura tiene un solo componente.

explain why calcuim and phosphorus from bone are important to the human body

Answers

Answer:

the mineral calcium helps your muscles, nerves, and cells work normally. Your body also needs calcium (as well as phosphorus) to make healthy bones. Bones are the main storage site of calcium in the body

In carbon dioxide (CO2), there are two oxygen atoms for each carbon atom. Each oxygen atom forms a double bond with carbon, so the molecule contains two sets of double bonds. Two sets of double bonds means that the total number of electrons being shared in the molecule is two. four. six. eight.

Answers

Answer:

Eight

Explanation:

In a single bond there are 2 electrons

In a double bond there are 4 electrons

Two double bonds = 8 electrons

Answer:the answer would be eight hope this helps

Explanation:

Which side is hypertonic ? A or B ?
Which side will gain water
What is c ?

Answers

Answer:

1-b

2-b

3-phospholipid bilayer

B side is hypertonic. It will gain water. C is Phospholipid layer.

What is Hypotonic Solution?

A hypotonic solution is a type of solution that has a lower osmotic pressure than any other solution to which it is compared. It is a solution in which a small amount of solute passes across a semipermeable membrane compared to the amount of solute in the other solution.

If the solute concentration outside the cell is lower than inside the cell, these solutes cannot cross the membrane, so the solution is hypotonic to the cell.

The cell membrane consists of a phospholipid bilayer containing embedded proteins present between these two solutions where a hypotonic solution has a relatively low concentration of solutes.

Thus, B side is hypertonic. It will gain water. C is Phospholipid layer.

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PLEASE HELP!!! WILL MARK AS BRAINLIEST!!! D:
A. SICKLE CELL ANEMIA: GENETICS AND EVOLUTION

Circle the mutation in DNA of the sickle-cell beta-globin gene fragment in the table below:
Wild-type beta-globin gene fragment
C A C G T A G A C T G A G G A C T C

Sickle-cell beta-globin gene fragment
C A C G T A G A C T G A G G A C A C


Transcribe beta-globin DNA into mRNA. Note: DNA is already arranged in triplet sets (below).

Translate mRNA codons into amino acids of hemoglobin protein sequence using the chart on page 3.



Wild-type beta-globin gene fragment
C A C G T A G A C T G A G G A C T C

Transcription produces mRNA fragment:
Translation produces wild-type beta-globin polypeptide fragment:

Sickle-cell beta-globin gene fragment
C A C G T A G A C T G A G G A C A C

Transcription produces mRNA fragment:
Translation produces mutant beta-globin polypeptide fragment:

Answers

In this example an adenine replaces a thymine. Wild-type mRNA  GUGCAUCUGACUCCUGAG/ Protein Val-His-Leu-Thr-Pro-Glu. Mutated mRNA GUGCAUCUGACUCCUGUG/ Protein Val-His-Leu-Thr-Pro-Val.  

--------------------------

Mutations are changes that occur in DNI nucleotide sequences that introduce new variants.

There are different types of mutations. In the exposed example, the last thymine from the Wild-type beta-globin gene fragment is replaced by an adenine in the Sickle-cell beta-globin gene fragment. The other bases remain equal.

Wild-type gene fragment    ⇒     C A C G T A G A C T G A G G A C T C

Sickle-cell gene fragment   ⇒     C A C G T A G A C T G A G G A C A C

Wild-type beta-globin gene fragment

Transcription

Transcription occurs in the nucleus. In RNA uracil replaces thymine.

While growing mRNA molecule,

adenine pairs uracil, thymine pairs adenine, and guanine pairs cytosine.

DNA    ⇒    C A C G T A G A C T G A G G A C T C

mRNA  ⇒   G U G C A U C U G A C U C C U G A G

Translation

Translation occurs in the cytosol. mRNA codons codify for amino acids.

Codons have been separated by a space.

mRNA  ⇒   G U G      C A U          C U G           A C U       C C U      G A G

Protein ⇒  Valine  -  Histidine  -  Leucine  -  Threonine - Proline - Glutamine

Sickle-cell beta-globin gene fragment

Transcription

DNA    ⇒   C A C G T A G A C T G A G G A C A C

mRNA ⇒   G U G C A U C U G A C U C C U G U G

Translation

mRNA  ⇒   G U G      C A U         C U G           A C U         C C U     G U G

Protein ⇒  Valine  -  Histidine  -  Leucine  -  Threonine - Proline -  Valine

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