Type II hypersensitivity occurs when aAn immediate allergic

Type II hypersensitivity occurs when: a.An immediate allergic or anaphylactic type of reaction occur b. Antibodies arc formed against antigens on cell surfaces c. Antigen-antibody complexes arc deposited in tissues d. Reactions do not require antibody production Which of the following is an example of type III hypersensitivity: a. Anaphylaxis b. SLE- Systemic Lupus Erythematosus c. Transfusions reactions d. Transplant rejection. Which of the following is capable of establishing the MAC- membrane attack complex, effect cell lysis? a. Mast cells b. MHC I proteins c. MHC II proteins d. Complement proteins In Myasthenia Gravis a. Acetylcholine receptors on neurons arc bound by antibodies b. Acetylcholine receptors on the motor end plate arc bound by antibodies c. Acetylcholine vesicles arc bound antibodies d. An autoimmune response is not involved. Cytotoxic T cells (CD8^+) react to cells that haw: a. Foreign MHC class II proteins on their surfaces b. B cell receptors c. Foreign MHC class I proteins on their surfaces d. Soluble antigens

Solution

13. b

The type II hypersensitivity occurs when, the antibodies produced by the immune response bind to antigens on the patient\'s own cell surfaces. This causes a B cell response, because here antibodies are formked against the foreign antigen.

14. b

SLE- Systemic lupus erythematosus, it is due to Nuclear antigens. It occurs when accumulation of immune complexes (antigen-antibody) takes place. Type III hypersensitivity causes inflammatory response and attraction of leukocytes.

15 d. complement proteins

Transmembrane channels formed by membrane-attack complex (MAC) leads to cell lysis and death by disrupting the cell membrane of target cells. It involves proteins C5 through C9

16 b.

Antibody block or destroy nicotinic acetylcholine receptors at the junction between the nerve and muscle.

17. c. Foreign MHC class I protein on thier surface.

cytotoxic T cell or CD8+ T-cell or killer T cell are able to recognize a specific antigen. TCR to bind to the class I MHC molecule,