tuesdays+homework

plasma membrane receptor proteins whose shape allows them to combine with particular antigens. 2. If the antigen is the key, what is the lock? (p.130) receptor 3. How many types of antigen receptors does one T cell or B cell have? (p. 130) one 4. How many different types of B cells and T cells do we need? Why? (p. 130) we need a variety of b and t cells to protect us against antigens 5. How many different types of B cell and T cells do we have? (p. 130) 6. What is the special name for the antigen receptor on a B cell? (p. 131) BCR 7. If an antigen and a B-cell receptor make a lock and key match, what does the B-cell do? (p. 131) B cell produces copies of itself 8. What does clonal expansion of the B-cells mean? When does this occur? (p. 131) when a antigen and B-cell receptor lock together, cytokines secreted by helper t cells stimulate B cells to clone. cytokines secreted by helper T cells stimulate B cells to clone it occurs when the B cell with a BCR that has a shape that fits the antigen 9. What are plasma cells? (p. 131) former B cells which circulate in the blood and lymph they have specific antigens 10. What is an antibody with respect to the B-cell receptor? (p.131) defense by B cells i s called antibody mediated immunity, activated B cells become plasma cells that produce antibodies 11. What are memory cells? (p. 131) memory B cells quickly divide and give rise to more plasma cells capable of quickly producing the correct type of antibody because memory cells remember the old virus 12. Why is B-cell defense called antibody mediated defense? (p.131) because activated B cells become plasma cells that produce antibodies 13. How do antibodies fight infection? (p.132) activate of the complement system 14. What is the name for the antigen receptor on a T-cell? (p. 134) T-cell receptor 15. T cell receptors cannot recognize antigen alone, the antigen must be attached to a self protein on a self cell. This protein is called the... (p. 134) HLA antigens 16. If the T cell lock matches an antigen key, what happens to the T cell? (p. 134) they can go on to destroy cells carrying foreighn antigens while leaving normal body cells unharmed 17. What do cytotoxic T cells do to cells that have antigens that match their T-cell receptor? (p. 135) re;eases perforin molecules which punch holes into the plasma membrane forming a pore and this causes the cell to undergo apoptosis and die 18. How do helper T-cells indirectly fight disease? (p. 135) they regulate immunity by secreting cytokines that enhance the response of all types of immune cells 19. Which of pertain(s) to B cells? a. have specific receptors b. are responsible for antibody mediated immunity c. synthesize and liberate antibodies ABC all have to do with B cells
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20. Which of these pertain(s) to cytotoxic-T cells? a. have specific receptors b. are more than one type c. are responsible for cell-mediated immunity d. stimulate antibody production by B-cells C || ||   ||   ||   || You are in Secure Mode **Your session has timed out**. Please enter your password.
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