Specific+Immune+System+SLS

** An antigen receptor is a plasma membrane receptor protein whose shape allows it to combine with antigens. ** APC
 * 1. B cells and T cells have antigen receptors on their surface. What is an antigen receptor? (p. 130)**
 * 2. If the antigen is the key, what is the lock? (p.130)** ** The lock is the receptor. **
 * 3. How many types of antigen receptors does one T cell or B cell have? (p. 130)** ** Millions. **
 * 4. How many different types of B cells and T cells do we need? Why? (p. 130)** ** We need as many as needed to match up with the individual antigens. **
 * 5. How many different types of B cell and T cells do we have? (p. 130)** ** Two B-Cells and Three T-Cells. **
 * 6. What is the special name for the antigen receptor on a B cell? (p. 131)** ** The specific name for the antigen receptor on a B cell is the BCR, B cell receptor. **
 * 7. If an antigen and a B-cell receptor make a lock and key match, what does the B-cell do? (p. 131)** ** When this connection is made, the B Cell then proceeds to copy itself. **
 * 8. What does clonal expansion of the B-cells mean? When does this occur? (p. 131)** ** This occurs when the connection between the 'lock and key' is made, and this is multiplication of the new cell. They also spread throughout the body to prevent further infection. **
 * 9. What are plasma cells? (p. 131)** ** Plasma cells circulate in the blood and in the lymph. **
 * 10. What is an antibody with respect to the B-cell receptor? (p.131)** ** The antibody with respect to the B Cell receptor is the memory cell. **
 * 11. What are memory cells? (p. 131)** ** Memory cells are left in the body for long term immunity, and they also are present to fight infection as soon as it enters the body. Before it is able to spread. **
 * 12. Why is B-cell defense called antibody mediated defense? (p.131)** ** Anti-mediated immunity because Bl cells become plamsa cells that produce antibodies. **
 * 13. How do antibodies fight infection? (p.132)** ** The attract the white blood cells which move in 'for the kill' --> an infection. **
 * 14. What is the name for the antigen receptor on a T-cell? (p. 134)** ** TCR **
 * 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)**
 * 16. If the T cell lock matches an antigen key, what happens to the T cell? (p. 134)** ** They go on to multiply and attack other foreign cells, restarting the process. **
 * 17. What do cytotoxic T cells do to cells that have antigens that match their T-cell receptor? (p. 135)** ** Clonal expansion. **
 * 18. How do helper T-cells indirectly fight disease? (p. 135)** ** Helper T Cells indirectly fight disease by releasing cytokines which then enhance the entire immune system response. **

b. are responsible for antibody mediated immunity** c. synthesize and liberate antibodies
 * 19. Which of pertain(s) to B cells?**
 * a. have specific receptors

a. have specific receptors b. are more than one type d. stimulate antibody production by B-cells**
 * 20. Which of these pertain(s) to cytotoxic-T cells?**
 * c. are responsible for cell-mediated immunity