True or false: A helper T-cell can directly recognize and bind to antigens on the surface...
True or false: A helper T-cell can directly recognize and bind to antigens on the surface of pathogens. If false, make it a correct statement.
Homework Answers
False.
A helper T cell interacts with the MHC 2 molecules present on the Antigen presenting cells. These MHC2 receptor contains the processed antigen. That's why, antigen is not found to be directly interact with the helper T cell.
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True or false: A helper T-cell can directly recognize and bind
to antigens on the surface...
True or false: One molecule of IgG can bind to 2 differently structured antigens at the...
True or false: One molecule of IgG can bind to 2 differently structured antigens at the same time. True O False Question 5 3 pts A person with HIV has far fewer Helper T cells than a healthy person because the virus infects and destroys Helper T cells. Which other cell type will be less common in a person infected with HIV compared to an uninfected individual? Unactivated (immature) B cells Macrophages Memory B cells Neutrophils
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...
True or False; One molecule of IgG may bind to many different types of antigens. True...
True or False; One molecule of IgG may bind to many different types of antigens. True O False
A) T cells B) B cells 18. Helper T cells recognize. 19. These cells recognize cells...
A) T cells B) B cells 18. Helper T cells recognize. 19. These cells recognize cells that contain foreign antigens (virally infected cells, tumor cells, foreign tissue grafts). 20. Cytotoxic T cells recognize. 21. TAP transporter transports peptides that are loaded onto. 22. These cells recognize whole protein antigens C) MHC I molecules D) MHC II molecules
Which of the following statements about how B and T cells recognize antigen are true? Correct...
Which of the following statements about how B and T cells recognize antigen are true? Correct any false statements. a. B cells only recognize antigen presented by class I or class II MHC molecules. b. Both cell types can recognize extra-cellular antigen free-floating in solution. c. Both cell types recognize extracellular matrix-bound antigens. d. T cells only recognize antigen presented by class I or class II MHC molecules.
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...
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.
Adaptive Immunity: Second Line of Defense—Cellular Defenses The T-cell receptors and CD4 and CD8 molecules interact...
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...
Question 33 1 pts True or False: The ABO and Rh-D antigens are the only antigens...
Question 33 1 pts True or False: The ABO and Rh-D antigens are the only antigens found on the surface of human red blood cells. O True O False
In the case of a helper cell, it can differentiate into T cells which will activate...
In the case of a helper cell, it can differentiate into T cells which will activate cells T helper 1 T-cell activation begins when an antigen to a CD4 or CD8 T cell. delivers phagocytic CD4 In contrast, T-cell activation requires the action of cells in order to differentiate into memory CD8 cells and activated CD8 cells. perforins Activated CD8 cells will mount a direct attack on target cells through the action of which punch holes in membranes, and which...
True or false: One molecule of IgG can bind to 2 differently structured antigens at the same time. True O False Question 5 3 pts A person with HIV has far fewer Helper T cells than a healthy person because the virus infects and destroys Helper T cells. Which other cell type will be less common in a person infected with HIV compared to an uninfected individual? Unactivated (immature) B cells Macrophages Memory B cells Neutrophils
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...
True or False; One molecule of IgG may bind to many different types of antigens. True O False
A) T cells B) B cells 18. Helper T cells recognize. 19. These cells recognize cells that contain foreign antigens (virally infected cells, tumor cells, foreign tissue grafts). 20. Cytotoxic T cells recognize. 21. TAP transporter transports peptides that are loaded onto. 22. These cells recognize whole protein antigens C) MHC I molecules D) MHC II molecules
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...
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 33 1 pts True or False: The ABO and Rh-D antigens are the only antigens found on the surface of human red blood cells. O True O False
In the case of a helper cell, it can differentiate into T cells which will activate cells T helper 1 T-cell activation begins when an antigen to a CD4 or CD8 T cell. delivers phagocytic CD4 In contrast, T-cell activation requires the action of cells in order to differentiate into memory CD8 cells and activated CD8 cells. perforins Activated CD8 cells will mount a direct attack on target cells through the action of which punch holes in membranes, and which...
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