Homework Answers
Correct answer is option 5th and 2nd
Explanation- helper T cells with CD4 surface marker and major histocompatibility complex 2 , generally stimulate and promote the growth of T cells and macrophages. They are activated when any antigen presents with MHC 2 proteins.
Helper T cells promotes the maturation of cytotoxic T cells and thus help in inducing cell meditated immunity.
Helper T cells also stimulate B(plasma cells) cells to produce antibodies
Other options are incorrect because-
Perforins are secreted by cytotoxic T cells and natural killer cells, not helper T cells.
Antibodies are secreted by B cells, not T cells.
And helper T cells interact with MHC protein for their function as mentioned above.
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Helper T cells: Multiple Choice o secrete perforin when activated. o convert to plasma cells after...
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Adaptive Immunity: Second Line of Defense—Cellular Defenses The T-cell receptors and CD4 and CD8 molecules interact with major histocompatibility complex (MHC) proteins. MHC proteins are found on most cells of the body. There are two variations, or classes, of MHC proteins. MHC class I is expressed on the surface of most cells of the body such as skin cells, liver cells, and others. Should a cell become infected with a virus, viral antigens are processed in the cells and expressed...
antibodies A specific B cell is activated when an) from a pathogen binds to one of...
antibodies A specific B cell is activated when an) from a pathogen binds to one of the _ on its surface. Activation also requires from helper T cells. 1 antigen antigen This activated cell then begins dividing into memory B cells, which will participate in the secondary immune response, and cells that will act as protein factories in this immune response. plasma During the primary immune response, these cells secrete cytokines During the secondary immune response, the rapidly, giving rise...
How does activation by T-independent antigens differ from this figure? Extracellular antigens B cell receptors Antigen...
How does activation by T-independent antigens differ
from this figure?
Extracellular antigens B cell receptors Antigen fragments MHC class II with antigen displayed on surface **Cytokines Plasma cell Antibodies T cell B cell B cell 1 APC receptors 2 Antigen is 3 Antigen fragments are T helper cell recognize and phagocytized and displayed on the B cell secretes cytokines, attach to antigen. digested (see surface, attracting a activating a B cell. Figure 17.12). matching T helper cell. Figure 17.5 Activation...
Put the following steps in the process of B-cell activation in cause-and-effect order: Long-lived memory cells...
Put the following steps in the process of B-cell activation in cause-and-effect order: Long-lived memory cells remain in the body to respond rapidly if the same antigen appears again The plasma cells produce and secrete large numbers of antibodies A helper T-cell with a complementary T-cell receptor binds the presented antigen The antigen is processed and presented by a class 2 MHC protein The T-cell releases cytokines that activate the B-cell An antigen binds to the B-cell receptors in the...
Pls help me fill in the blanks sir/maam T cells mature in the thymus gland in...
Pls help me fill in the blanks sir/maam
T cells mature in the thymus gland in response to that is secreted by the thymus gland. When a T cell leaves the thymus it has a unique These T cells are not able to recognize foreign invaders called _without help. The invader has to be presented to the T cell in a specific way by an __ protein. Immunity mediated by T cells and Tc cells is referred to as _immunity....
31. Which part of this T cell receptor is produced only AFTER the T cell has...
31. Which part of this T cell receptor is produced only AFTER the T cell has bound an antigen? A. The part labeled "A" B. The parts labeled "B" C. The entire T cell receptor D. None of it. It is all produced BEFORE antigen binding. E. T cells don't bind antigens; only antibodies do that. 37. How do Treg cells differ from Th cells? A. When Treg cells bind B7, they engulf and destroy it. B. Treg cells secrete...
xam Name MULTIPLE CHOICE. Choose the one alternative that best com pletes the statement or answers...
xam Name MULTIPLE CHOICE. Choose the one alternative that best com pletes the statement or answers the question 153 The process whereby neutrophils and other white blood cells are attracted to an inflammatory site is called D) chemotaxis phagocytosis B) diapedesis C) TRUE/FALSE. Shade "A" if the statement is true and "B if the statement is false. I @ Substances capable of triggering the adaptive immune system and provoking an immune respono are called antigens. I 7 It is our...
answer all the questions answering one question is not helpful 1. A helper T cell is...
answer all the questions answering one question is not helpful 1. A helper T cell is capable of helping another cell because it expresses a protein on its surface that binds to a different protein on the surface of the cell being helped. What are these proteins (on the T cell, and on the cell being helped)? CD28, and B7 TNF, and TNFR Class I MHC, and TCR CD40L, and CD40 CTLA-4, and B7 2. Helper T cells are restricted...
A physician is trying to determine if a patient has functioning helper T cells. Which of...
A physician is trying to determine if a patient has functioning helper T cells. Which of the following events would provide evidence that helper T cells are acting normally? Select one: O A. Memory cells are produced after the secondary immune response. O B. The inflammatory response is triggered. O C. Antibodies recognize and bind to antigens. O D. Antibodies are found in the blood.
QUESTION 41 Which cells produce plasma cells that secrete antibodies? O reticular cells macrophages O dendritic...
QUESTION 41 Which cells produce plasma cells that secrete antibodies? O reticular cells macrophages O dendritic cells Tlymphocytes OB lymphocytes QUESTION 42 The layers of the adrenal cortex, in order from most superficial to deepest are: cortex, medulla zona glomerulosa, zona fasciculata, zona reticularis zona reticularis, zona fasciculata, zona glomerulosa Omedulla, zona glomerulosa zona medulla, zona cortica, zona fasciculata QUESTION 43 Which of the following statements is true? individuals with type AB blood have type A agglutinogens and anti-B agglutinins...
antibodies A specific B cell is activated when an) from a pathogen binds to one of the _ on its surface. Activation also requires from helper T cells. 1 antigen antigen This activated cell then begins dividing into memory B cells, which will participate in the secondary immune response, and cells that will act as protein factories in this immune response. plasma During the primary immune response, these cells secrete cytokines During the secondary immune response, the rapidly, giving rise...
How does activation by T-independent antigens differ
from this figure?
Extracellular antigens B cell receptors Antigen fragments MHC class II with antigen displayed on surface **Cytokines Plasma cell Antibodies T cell B cell B cell 1 APC receptors 2 Antigen is 3 Antigen fragments are T helper cell recognize and phagocytized and displayed on the B cell secretes cytokines, attach to antigen. digested (see surface, attracting a activating a B cell. Figure 17.12). matching T helper cell. Figure 17.5 Activation...
Pls help me fill in the blanks sir/maam
T cells mature in the thymus gland in response to that is secreted by the thymus gland. When a T cell leaves the thymus it has a unique These T cells are not able to recognize foreign invaders called _without help. The invader has to be presented to the T cell in a specific way by an __ protein. Immunity mediated by T cells and Tc cells is referred to as _immunity....
31. Which part of this T cell receptor is produced only AFTER the T cell has bound an antigen? A. The part labeled "A" B. The parts labeled "B" C. The entire T cell receptor D. None of it. It is all produced BEFORE antigen binding. E. T cells don't bind antigens; only antibodies do that. 37. How do Treg cells differ from Th cells? A. When Treg cells bind B7, they engulf and destroy it. B. Treg cells secrete...
xam Name MULTIPLE CHOICE. Choose the one alternative that best com pletes the statement or answers the question 153 The process whereby neutrophils and other white blood cells are attracted to an inflammatory site is called D) chemotaxis phagocytosis B) diapedesis C) TRUE/FALSE. Shade "A" if the statement is true and "B if the statement is false. I @ Substances capable of triggering the adaptive immune system and provoking an immune respono are called antigens. I 7 It is our...
A physician is trying to determine if a patient has functioning helper T cells. Which of the following events would provide evidence that helper T cells are acting normally? Select one: O A. Memory cells are produced after the secondary immune response. O B. The inflammatory response is triggered. O C. Antibodies recognize and bind to antigens. O D. Antibodies are found in the blood.
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