For T cells positive selection takes places primary dues to the interactions with (1) and the negative selection primarily occurs dues to the interactions with (2))

Answers

Answer 1

Answer:

1) cortical epithelial cells; (2) macrophages and dendritic cells

Explanation:

T cells, also known as T lymphocytes, are a fundamental type of cell of the immune system that determines the specificity of the immune response to specific foreign particles (antigens). T cells are produced in the Thymus (it is for that reason that they are called T cells) and then circulate throughout the bloodstream in order to recognize specific antigens in association with major histocompatibility complex (​MHC) molecules on the surface of antigen-presenting cells (APC), such as macrophages and dendritic cells. T cells undergo positive and negative selection: 1- positive T-cell selection refers to the process by which T cells bind cortical epithelial cells that express Class I or Class II MHC molecules with enough affinity to get a survival signal; whereas negative selection occurs when T cells bind to macrophages and dendritic cells that express MHC specific receptors with a strong enough affinity to get an apoptosis (programmed cell death) signal.


Related Questions

PLEASE ANSWER ASAP ITS MY LAST QUESTION

When people talk about recreational drugs, what definition of "drugs" are they using?

A.) Non-food chemicals that alter the way a person thinks, feels, functions, or behave.

B.) Mood-altering chemicals derived from plants.

C.) Chemicals available only by prescription from a licensed medical professional.

D.) illegal chemicals without any legitimate medical use. ​

Answers

[tex]\bold{{Answer}}[/tex]

B.Mood-altering chemicals derived from plants.

please correct my answer if its wrong

B or C

Sorry if it’s wrong

adulescence boy and girl are painfully sensitive true or false ?​

Answers

Answer:

true due to the imbalance of hormones

Which of the following is NOT true of effective prenatal care?

A. It is not required until the third month of pregnancy.
B. It may include bloodwork and tests for infectious diseases such as HIV.
C. It should be prompt and consistent, with all doctor recommendations observed.
D. It should include monitoring of your height, weight, and blood pressure​

Answers

I believe it’s A and D

what do you mean by environment ?​

Answers

Answer:

Surrounding of organism.

Explanation:

Environment is the surrounding in which the organism lives. There are many biotic and abiotic factors on which the organism depends and without them the organism can survive. The biotic component refers to the living  component of the environment while on the other hand, abiotic factor is the non-living component of the environment. All the organisms are depend on both living and non-living component of environment.

Which fitness level is helpful to know when a person is starting an exercise program?
o their own level
an Olympic athlete's level
O a friend's level
a fitness professional's level

Answers

Answer:

their own level

Explanation:

Before starting an exercise program, students need to know their own level so they know what they need to improve on.  Knowing your own fitness level can help you set goals for yourself.

please help me with this !

Answers

list the sample choices and i will answer all for you
Could you dm me the choices

please help it’s 9 th grade health

Answers

Answer:

well

Explanation:

im in 8th sooooooooo sorry cant help

In order to maintain good sleep hygiene, it is best to reserve your bed for sleeping and to engage in all other activities in other parts of your house.

Answers

True! This makes it so your bed is known just for sleep.

Answer:

True

Explanation:

What tissue work together to form muscles?

Answers

muscular and connective tissues.

In the decision making process, identifying and weighing options as well as their risks and consequences is: implementing deciding evaluating deliberating

Answers

Answer:

evaluating,

Explanation:

the person has have all of the information before accomplishing the other  processes.

What health problems are associated with being overweight and having too fat fat in the blood

-low blood pressure
-diabetes
-increase risk of heart attack
-reduced risk of arthritis
-blocked and clogges arteries
-high cholesterol

Answers

blocked and clogged arteries

Answer:

diabetes

increase risk of heart attack

blocked and clogges arteries

high cholesterol

Explanation:

took the test, got it right

Hey, I really need help. I am sad all the time and don't know why. I stay up till midnight everynight until I cry myself to sleep. My life is great! And I do so much fun stuff with my family, but in the end, I always end up sad again. Can I please get some help? Why do I feel this way?

Answers

Answer:

umm... your probaly depressed you shoud talk to a doctor

Alexa had a single sexual encounter with Jake about five years ago. Jake has just notified Alexa that he has tested positive for HIV. Which of the following may be true for Alexa?

A. She may be in the clinical latency stage of HIV infection but have no symptoms.
B. If she has not developed any symptoms of infection by now, it's unlikely she has HIV.
C. If it turns out that she is infected with HIV, there is little she can do now to protect her health.
D. She is certain to develop full-blown AIDS within the year if she does not begin medication.​

Answers

the correct answer is a

Parents who _________________ meet their child's basic needs for shelter, food and water, and clothing.

encourage obedience
ensure a safe environment
provide educational foundations
use positive discipline​

Answers

Answer:

The answer is b since this is what it would look like

Parents who encourage obedience meet their child's basic needs for shelter, food and water, and clothing.

Hope This Helps!!!

b) ensure a safe environment

1.5.2 mental and emotional health

Answers

Have any questions? Or concerns ?

Physical wellness helps improve diabetes,creative ability, finances, emotions

Answers

Answer:

all of these is the answer

a person who has a vegatarin plan

Answers

they’re a vegan ————
That would be vegan………

If you could spend 1 day with anyone who has ever lived, whom would you spend it with, and what would you ask this person?

Answers

I was Kobe Bryant and I would ask him how was the greatest player life
I would spend the day with princess diana and I would ask her if she ever pulls charles’ ears for fun

Bakit kailangan ng ating halaman at lupa

Answers

Answer:

para mabuhay Ang halaman na pan lupa

Chris has yellow skin and suppress appetite and high blood pressure which drug does Grace most likely abuse

Answers

Answer:

Tobacco

Explanation:

Various investigations have identified more than 4000 chemical elements in tobacco smoke particles. It has been shown that at least 60 of them, such as nickel, are carcinogenic. Nicotine, the addictive ingredient in tobacco, stimulates the nervous system, which speeds up the heart rate and increases blood pressure. Other research showed that nicotine stimulates a group of neurons in a region of the brain called the hypothalamus, which are responsible for communicating to the body that it has already eaten enough and is satisfied. Finally, smokers also have other visual effects such as yellowish pigmentation around the fingers, hands, teeth and even the hair can acquire that yellowish hue.

Read the following lyrics, and determine whether the song is promoting healthy or unhealthy relationships.Daughtersby John MayerI know a girlShe puts the color inside of my worldBut she's just like a mazeWhere all of the walls all continually changeAnd I've done all I canTo stand on her steps with my heart in my handsNow I'm starting to seeMaybe it's got nothing to do with meFathers, be good to your daughtersDaughters will love like you doGirls become lovers who turn into mothersSo mothers, be good to your daughters tooOh, you see that skin?It's the same she's been standing inSince the day she saw him walking awayNow she's leftCleaning up the mess he madeSo fathers, be good to your daughtersDaughters will love like you doGirls become lovers who turn into mothersSo mothers, be good to your daughters too

Answers

Answer: Healthy relationships

Explanation:

The speaker talks about how he had done all he can to be a good person to his girl-friend or rather, a girl he likes, but this wasn't enough and it wasn't his fault but rather her upbringing.

He is therefore telling parents to form healthy relationships with their daughters so that their daughters can be healthy partners in relationships themselves.

Claryfy in your own words in a couple of sentence how environment education, population educationand health education ate interrelated taking any one basis​

Answers

Answer: Population, health, and environmental education are often considering one integrated subject because they have many things in common and they are bonded because if something is not working with one, other educations are also in degradation.

For example, when it comes to population growth there the environmental aspects are also changing because then can come to the degradation of the recourses. After that, also the degradation of the recourses is affecting health education and way of living.

is the pituitary glad controlled by sex hormones

Answers

Answer:

Yes

Explanation:

The hypothalamus controls the pituitary gland by releasing hormones such as corticotrophin, dopamine, somatostatin, gonadotrophin and thyrotropin

Through secretion of its hormones, the pituitary gland controls metabolism, growth, sexual maturation, reproduction, blood pressure and many other vital physical functions and processes.

Please help! I am doing online lesson 5.6 Decision Making for Life Management Skills. These are the last few questions I need help with. Please do not put a weird answer I need it done in 15 mins.
Evaluate each of the options and alternatives.
4. Choose the best option.
5. Act on your decision.
6. Evaluate your outcomes.

Explain how using the 6 step Decision Making sequence above helps aid in wise decision making. Write 2 paragraphs containing a minimum of 10 sentences. (12 points)

This is the case scenario: You attend a party with two friends. The three of you agree to meet out front to leave at a set time. One person is not outside, and you go looking for her. When you find her, she appears to be drugged. Using any drug or alcohol isn't typical for her and her parents expect her home in 20 minutes. What will you do?

Answers

Answer:

-34

Explanation:

Which of the following can affect how health information is presented?
A. who paid for it
B. its purpose
C. who reviewed it
D. all of the above
.

Answers

Answer:

D is the answer

hope you are satisfied with my answer

Even if you are willing to take on more responsibility, you need to make sure that ______. a. you do not take on too much b. you do not take on too little c. you do not take on hard work d. you do not take on easy work Please select the best answer from the choices provided A B C D

Answers

Answer: A

Explanation: When you take on a bit to much responsibility it makes it hard to keep up with it all and you end up in trouble or even worse. Taking on to much can increase stress and depression making you not work as hard as you would normally do.

Answer:

A.you do not take on too much

Explanation:

correlation ship between health education,&home science long question????????​

Answers

Answer:

it I used to be health activities you could do healthy activities at home

Explanation:

maybe i don't know

Type an illustration of your own that will help you to explain to someone else how long eternity is.

Answers

Answer:

Eternity is like a deep dark hole that your falling through the problem is it is endless you keep falling and falling and you never stop falling.

Explanation:

How is that?

In this illustration, the drops of water represent fleeting moments in time, and the vast ocean represents eternity—an eternal expanse that goes on forever, beyond the reaches of our understanding.

Imagine a single drop of water falling into the vast ocean. Now, imagine that this drop of water represents a single second in time. It is incredibly small compared to the immense expanse of the ocean, just as a second is infinitesimally brief compared to eternity.

Now, multiply that drop of water by a million, and let each drop represent a second. Even with a million drops, the ocean remains vast and seemingly endless. This can symbolize a million seconds, or approximately 11 days and 14 hours.

But now, let's expand our perspective even further. Imagine filling the entire ocean with drops, each representing a second, for an entire year. The ocean would still be immense, stretching as far as the eye can see. This illustrates the magnitude of a year, with its 31,536,000 seconds.

Now, consider that eternity encompasses not just one year, but countless years, each filled with an unimaginable number of seconds. It stretches far beyond our comprehension, like an infinite ocean that has no end.

Try to know more about eternity:

https://brainly.com/question/30650204

#SPJ2

More than … percent of all poisonings involve children under 5 years old
A. 50
B.75
C.90
D.99

Answers

Answer:

50 percent of all poisonings involve children under 5 years old

les regalo estos puntos

Answers

Answer:

TY for the points ^_^ realmente lo aprecio❤

Answer:

¡Muchas gracias!

Explanation:

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