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Durng the infection , proteinsipeplides derived from the virus will play an important role detemmining which B cells are posilively selected in tne bone martrow; an...

Question

Durng the infection , proteinsipeplides derived from the virus will play an important role detemmining which B cells are posilively selected in tne bone martrow; and in determining which cells will be positively selected in the thymusTrueFalseDo you think the human body contains Tregs specific for the virus proteins prior to infection?YesCross presentation Wall . enhancc which component of the adaptive immune responsc?Effector TH responseEffector Tc (CTL) response

Durng the infection , proteinsipeplides derived from the virus will play an important role detemmining which B cells are posilively selected in tne bone martrow; and in determining which cells will be positively selected in the thymus True False Do you think the human body contains Tregs specific for the virus proteins prior to infection? Yes Cross presentation Wall . enhancc which component of the adaptive immune responsc? Effector TH response Effector Tc (CTL) response



Answers

Which of the following best describes the difference in the way B cells and cytotoxic T cells deal with invaders? a. $\mathrm{B}$ cells confer active immunity; T cells confer passive immunity. b. $\mathrm{B}$ cells send out antibodies to attack; certain T cells can do the attacking themselves. c. $\mathrm{T}$ cells handle the primary immune response; B cells handle the secondary response. d. $\mathrm{B}$ cells are responsible for the cell-mediated immune response; T cells are responsible for the humoral immune response.

Hello, everybody. Today I'll be helping you with the 16th problem of the Chapter 41 problems up. And this question is asking each what does HIV typically in fact, So when you get HIV, where does it usually attack first? So I'll do this by process of elimination, and then I would try to deduce where it in effect. So you have B lymphocytes. Um, so this is not necessarily true because, um, B lymphocytes are not going thio matter with HIV because from the 15 problem, you know that HIV is our viral infection. So it's not gonna infect the B lymphocytes because B lymphocytes specifically are associated with bacterium and bacteria type of ah infections. So that's not going to help. So, for example, gonorrhea B lymphocytes would be associated with that because then it would need a helper B cell, and then it created a bunch of B lymphocytes to kill the bacterium. And then you have sight toxic T lymphocytes, which would make sense because the Cytoxan T cells do attack all cells that could be could possibly be infected with a virus, so that could possibly to be true. And then you have ah hell parties, ci lymphocytes. And how is the true one? So be is false site. Toxic ones are not the ones that are effective. It's actually helper t lymphocytes. Because when the helper t lymphocytes are attacked, they can no longer create. So if ah so you have the helper helper t which gives it yields a sigh. Toxic T HIV attacks helper T cells, which makes this no longer able to do that. So the site toxic T cells can no longer attack the HIV. So I hope you found this fair helpful. And I hope you have a fantastic day. Thank you very much.

So this question is asking which of the following statements is false about T cells. Um, And looking at the first statement, we can confirm that it is true. T helper cells do released site all kinds, um, that induce immune responses and decide a toxic T cells. Um, do induce apoptosis in cells that are infected by a pathogen, Um, so we can cross that out. The second statement is also true. T helper cells do come from CD four cells, while sido toxic T cells do come from CD eight cells. And the fourth statement is also true. Um, t cell receptors are about are found on both CD four cells and CD eight cells. So the statement, which is false about T cells, is this statement about the same age. See receptors. Um, it is in fact, reverse the make C one. Recep there is found on most cells in the body, specifically on nuclear hated cells. While it is the image see two receptor that is found only on immune cells

Well, everybody, this is Ricky. And today we're gonna go through problem 49th room check for 33 and this is question on power. T cells help he sell maturation, and so they end up doing so, Um, by secreting side of kinds, this video is helpful.

This question asked, What is the response of the immune system to down regulation of the MHC molecules on somatic cells? So a healthy so is going to exhibit MHC Class one molecules. Natural killer cells are going to monitor the expression of those MHC molecules on the surface season cells. And when we have a viral infection or a cancer, for example, this will cause a reduction in the expression of MHC Class one modules. So if we have an infected cell cancer so perhaps or saw that is going to be infected with the virus, we're going to see a decrease in the number of MHC Class one molecules. And the natural killer cells are able to detect this lack of MHC and thus induced apoptosis and thereby were seeking to prevent the infection from spreading and have those cells that are infected self destruct. So the choice that correctly indicates what happens when there's going to be a down regulation of MHC molecules. Well, the immune response is going to be natural killer cells inducing a pop doses of infected cells. So I see is the correct answer here


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