White blood cells use __________ to help identify foreign substances in the body. A. platelets and white blood cells B. antibodies and antigens C. enzymes and red blood cells D. white blood cells and red blood cells White blood cells use __________ to help identify foreign substances in the body. A. platelets and white blood cells B. antibodies and antigens C. enzymes and red blood cells D. white blood cells and red blood cells
Answer:
b
Explanation:
White blood cells use antibodies and antigens to help identify foreign substances in the body.
What are antigens and antibodies?An antibody is a Y-shaped protein that is secreted by specific types of white blood cells that have the ability to recognise pathogens (infectious agents) such as viruses and bacteria. An antibody is also known as immunoglobin, which is another name for the protein. The two ends of the "Y" are able to attach themselves to either the infected cell or the pathogen via a specific target that is referred to as the antigen (also known as the antibody generator).
In doing so, the antibody successfully marks the pathogen for neutralisation, which can be accomplished by either destroying the pathogen or preventing it from entering a healthy cell, or by signalling other complementary proteins to surround and consume the invader in a process known as phagocytosis.
Therefore, option (B) is correct answer.
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The absolute refractory period of an action potential:___________
a. prevents summation of action potentials
b. allows a neuron to ignore a second signal sent that closely follows the first
c. ensures one-way travel down an axon
d. A and B
e. A, B, C
Answer:
e. A, B, C
Explanation:
An action potential is a short event during which the membrane potential of an excitable cell increases and then falls rapidly. Membrane potentials correspond to potential differences across the membrane of excitable cells.
The absolute refractory period (P-RA) during which any stimulation is ignored, regardless of its intensity corresponds to the activation of fast sodium channels (quick response fibers) or calcium-sodium channels (slow response fibers). It begins in phase 0 of the action potential and ends in the repolarization phase (phase 3 for a fast fiber) when the membrane potential is sufficiently electronegative to restore the reactivation of these channels. It corresponds on the ECG to the interval between the onset of QRS and the top of the T wave.
The relative refractory period (P-RR) during which the cell is hypoexcitable. It corresponds to the start of the reactivation of the ion channels. Reactivation is incomplete and the action potential that results from stimulation during this period has unusual properties that expose conduction problems (block in phase 3) and may cause cells to desynchronize. Thus, an extra-stimulus which falls on the relative refractory period (R / T phenomenon) could cause ventricular tachycardia or ventricular fibrillation.
Thus; the absolute refractory period of an action potential prevents summation of action potentials, allows a neuron to ignore a second signal sent that closely follows the first and ensures one-way travel down an axon .
Calories are:
A. a measure of heat energy in food
B. an important nutrient
C. found in Earths's crust
Explanation:
A. a measure of heat energy in food
Answer:
I'm going to say A)
Explanation:
A calorie is a unit of energy.
Which functions does the endocrine system help regulate? Check all three that apply.
mood
social skills
metabolism
reproductive processes
intellect
Answer:
metabolism, mood, reproduction.
Explanation:
Answer:
mood
metabolism
reproductive processes
Explanation:
The endocrine system controls your hormones. Hormones are used to regulate your mood and metabolism as well as aid in the development and upkeep of your reproductive organs.
I hope this helps :)
8. Which of the following has the most fat?
A. apple
B. potato chips
Answer:
patato chips--? I'm pretty sure they do anyway.
Potato chips
it is more fatting than an apple I think
Can some one plzzzzz help me i need the answer
Answer:
A. perspiring when the body overheats
Explanation:
Homeostasis is the body's way of maintaining its health.
Sweating is what the body does on its own to maintain balance, so A is the best option here.
B, C, and D are results of exterior factors rather than actions the body takes.
The minimum amount of stimuli that can be detected by one of your senses, such as faintest of smells humans can detect is called the
a) extrasensory perception
b) sensory receptor
c) adaptation syndrome
d) absolute threshold
Answer:
The minimum amount of stimuli that can be perceived by the senses is called the absolute threshold (option d).
Explanation:
Absolute threshold implies the capacity of a sensory receptor to perceive very small stimuli and marks the beginning of the perception of a specific sense. This means that any stimulus whose intensity is less than the absolute threshold will not be perceived.
The capacity to perceive stimuli is individual, and for each person the absolute threshold is different, which is why there are people with a better sense of smell or a greater capacity to differentiate flavors. Repeated stimuli can cause the absolute threshold to increase, decreasing the capacity to perceive very small stimuli.
the other options are not correct because:
a. Extrasensory perception is an unproven phenomenon that involves perceiving stimuli by senses other than the five already known.
b. A sensory receptor is a structure capable of detecting stimuli and converting them into nerve impulses.
c. The adaptation syndrome is more linked to stress and the presence of stressors.
Which part of the body manufactures erythrocytes, thrombocytes, and leukocytes?
The
within the bones has the important function of making three kinds of blood cells. Red blood cells, called erythrocytes, carry oxygen to body tissues. Platelets, called thrombocytes, are used for clotting to stop bleeding if there is a wound in the body. White blood cells, called leukocytes, are essential in fighting disease.
Answer: Bone marrow
Explanation:
The facts from your question about the function of erythrocytes, thrombocytes, and leukocytes are true.
Bone marrow is considering spongy tissue that is found in our bones and bone marrow contains stem cells which are important for red blood cells, white blood cells, and platelets.
The stem cells can develop into those three and in that way, the whole body system is connected.
Which statement correctly describes the fetal development process?
A) The fetus undergoes the most rapid weight gain during the first trimester.
B) The fetus takes an average of 30 weeks to mature after conception.
C) Fetal organ systems develop at a steady rate throughout pregnancy.
D) To ensure proper growth, a fertilized egg must implant in the wall of the uterus
Answer: C
Explanation:
Answer:To ensure proper growth, a fertilized egg must implant in the wall of the uterus.
Explanation:egde
Both the father and the mother should share in meeting the financial needs of the family.
Can someone help me with culinary please?
Answer: Sure,
Explanation:
"Culinary arts, in which culinary means "related to cooking", are the cuisine arts of food preparation, cooking, and presentation of food, usually in the form of meals."
Mastering the culinary arts is a skill that could take you wherever you want to go. Top quality chefs are in high demand around the world. It's the perfect career for those who demand perfection of themselves and those who take pleasure in providing the highest quality service and culinary creativity to their clients. As you consider your career options, be sure to take into account 10 benefits that are cooking up in the kitchen.
:)
James is sitting at his desk on the ground floor of an office building when the entire room starts shaking. Which action
is most appropriate in this situation?
1standing near a window
2running out of the building
3holding up a bookshelf
4preparing for aftershocks
Answer:
4
Explanation:
asides from hide under something sturdy everything else could get you killed. Especialy holding up a bookshelf. If it falls on you you could get hurt. Dont run out of the building thats just common sense. Dont stand near a window you could get hurt of cut from broken glass.
3. When the room starts shaking (earthquake) the appropriate action for James would be holding up a bookshelf.
What is an earthquake?
"An earthquake is what happens when two blocks of the earth suddenly slip past one another. The surface where they slip is called the fault or fault plane."
What are the main precautionary measures to be taken during an earthquake?
The main precautionary measures to be taken during an earthquake are as follows:
Stay calm! If you're indoors, stay inside. If you're outside, stay outside.If you're indoors, stand against a wall near the center of the building, hold up a heavy object or furniture, stand in a doorway, or crawl under heavy furniture (a desk or table). Stay away from windows and outside doors.If you're outdoors, stay in the open away from power lines or anything that might fall. Stay away from buildings (stuff might fall off the building or the building could fall on you).Don't use matches, candles, or any flame. Broken gas lines and fire don't mix.If you're in a car, stop the car and stay inside the car until the earthquake stops.Don't use elevators (they may shut down).To know more about earthquake here https://brainly.com/question/1296104
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anyone can help with these as well?
Answer:
Question 3: a,b,c
Question 4: True
Question 5: True
Culture contributes to the context that a behavior is acceptable.
Please select the best answer from the choices provided
T
F
Answer:
that is not applicable to all cultures known
The answer is "True".
Edge 2021
HOW MANY DAY IN 1 months
Answer: its 30 days
Explanation:
Which of the following people is most likely to be suffering from depression?
A.
Violet is a very talented and a very competitive tennis player. She loses her temper fast and sulks for days whenever she loses a match.
B.
Sammy doesn't especially like going to parties or talking on the phone with his friends. He prefers reading in his room and playing with his dog.
C.
Natalie hasn't made friends at her new school after she moved because her parents got divorced. She spends a lot of time in her room and has trouble studying.
Answer:
B
Explanation:
rate the meal 1-10
i looks like a 2/10
who ever made this should go to jail
PLZ HELP ME WILL BECOME SOMEONE'S FRIEND IF THEY GET IT RIGHT
Which statement would be supported by scientists who research cycles of violence across generations in a family?
All victims of childhood abuse will come abusers as adults.
Child victims of abuse are more likely to become abusive as adults.
Most abusers deliberately teach their children how to be violent.
Like other genetic disorders, violence is passed down from parents to offspring.
More then likely B
Explanation:
Answer:
B
Explanation:
Please explain how perception plays a role in stress.
Answer:
An individual's perception of health plays an important role in determining health outcomes. ... Those who perceive that stress affects their health may have an external locus of control, believing that their health is not in their control, but attributable to external circumstances.
Explanation:
Which health-related component should start your warm-up?
A. Flexibility
B. Muscular strength and endurance
C. Reaction time
D. Cardiorespiratory
Answer:
I think flexibility, think like stretching before a work out
Which of the following are NOT true about Herpes?
1. can be cured
2. can be treated
3. have no symptoms
4.stay in the body for life
The difference between the image provided by each eye is called
a) color blindness
b) blind spot
c) adaptation
d) binocular disparity
Answer:
D
Explanation:
retinal disparity. the difference between the images provided by the two retinas. When the images are brought together in the brain, they provide a sense of depth.
What are your thoughts on drug addicts?
Can any one help me
Answer:
b
Explanation:
Answer:
B
Explanation:
The unit tells us that “every activity you do is making you stronger, healthier, and happier” and “the real gift of fitness is the way it makes you feel inside.” What are some other types of things,besides physical activity, that affect the way that you feel inside and your health? Please give examples of two things that would create positive effects and two things that would create negative effects.
THIS IS IN FITNESS.
Answer:
Eating healthy food, Mental breaks
Negative: Sitting down all day, and eating junk food
Explanation:
Answer:
If you take good care of your mental health and eat healthy foods, you can influence your body positively without taking part in physical activity. A healthy mind is just as important as a healthy body! When you don't take care of your mental fitness or eat junk food, you can create negative effects on your body by having anxiety, depression, and mental breakdowns.
( sorry If im late to answer! )
Why would guy text me everyday Hi
Is he trying to tell me something but he”s hiding it??!!
Answer:
Do you ever respond?
Explanation:
Maybe he keeps texting because you never respond
Which of the following has the greatest impact on the lifestyle of young children?
Of the following, which is not likely to occur while utilizing collaborative learning?
A. Each student researches and then shares necessary information vital to completing the task.
B. Each student works independently to come up with a solution for solving a problem.
C. One student teaches another in learning about a new math concept.
D. Each student is matched with another student of varied ability, and together they complete the
task.
Answer:
Your answer should be B: Each student works independently to come up with a solution for solving the problem.
Explanation:
Edge 2020
Updating your manager and asking for their opinion. Praising the efforts of the other team members. Providing team members with insights and practical advice to enhance group procedures Thus option B is correct.
What utilizing collaborative learning?Create activities that allow kids to cooperate and learn from one another while having fun.Collaboration in the classroom has been shown to aid pupils in developing higher order thinking skills as well as self-assurance and self-worth.
The educational strategy of using groups to improve learning through cooperation is known as collaborative learning. Learners who are in groups of two or more collaborate to solve issues, finish tasks, or understand new ideas.
Therefore, Each student works independently to come up with a solution for solving a problem.
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25. The urethra extends from thes
bladder to the rectum
uterus to the vagina
bladder to the outside of the body
ovaries to the uterus
Answer: Bladder to outside the body
Explanation:
If cardiac output is the same at rest between
trained and untrained; but trained have lower
resting heart rate; explain why that is?