35.2 pages 638-640

1. 35.2 pages 638-640 Group 3

2. Antigen • Foreign substance usually a protein, or a polysaccharide that stimulates the immune system to react such that to produce antibodies.

3. Self Antigen • An antigen that the body itself produces the antigens

4. Antigen Receptor • Receptor proteins in the plasma membrane of immune system cells whose shape allows them to combine with a specific antigen

5. Plasma Cell • Matured B cell that produces antibodies.

6. Memory B cell • Forms during a primary immune response, but enters a resting phase until secondary immune response occurs.

7. Antibody-mediated Immunity • Specific mechanism of defense in which plasma cells derive from B cells produce antibodies that combine with antigens. • Defense by B cells

8. Immunoglobulins • Globular plasma protein that functions as an antibody.

10. B cells has a b cell receptor (bcr) designated by shape that will combine with a specific antigen. Activation occurs when antigen combines with BCR. In the presence of cytokines, the b cell undergoes clonal expansion producing many plasma cells that secrete antibodies specific to the antigen and memory b cells that remember the antigen in the future. After infection passes, plasma cells undergo apoptosis.

11. An antibody contains two heavy polypeptide chains and two light chains arranged so there are two variable regions, where a particular antigen is capable of binding with an antibody

12. What is a matured B cell that produces antibodies? • T Cells • Macrophages • Plasma cells • Dendritic cells

13. What happens to plasma cells after an infection has past? A. They produce more B. They turn into B Cells C. they turn into T cells D. They undergo apoptosis.

14. Which immune cell is responsible for a specific immunity? • Plasma cells • Lymphocytes cells • Memory cells • B cells

15. Answers • C • D • B