Match the immune tolerance mechanisms in Group I with their respectiveoutcomes in Group II.Group I Group IIP. Anergy 1. Elimination of activated T-cellsafter antigen clearanceQ. Activation-induced cell death 2. Inhibition of auto-reactive T-cells atperipheryR. Receptor editing 3. Unresponsiveness to antigens due tolack of co-stimulatory moleculesS. Regulatory T-cells 4. Elimination of auto-reactive B-cells(A) P-3, Q-1, R-4, S-2(B) P-4, Q-3, R-1, S-2(C) P-3, Q-4, R-2, S-1(D) P-3, Q-2, R-4, S-1

Match the cell type (Column I) with its function (Column II).Column I Column IIP. B cells 1. Humoral immunityQ. Neutrophils 2. CytotoxicityR. T cells 3. Histamine-associated allergyS. Mast cells 4. Phagocytosis(A) P-1, Q-2, R-3, S-4(B) P-1, Q-4, R-2, S-3(C) P-4, Q-3, R-1, S-2(D) P-4, Q-3, R-2, S-1

The type of adaptive immunity in which T cells destroy virus-infected or cancer cells is -mediated immunity.

Th2: regulatory cells, supressing immune responses to prevent hyperactive immune responses

Desensitization immunotherapy administers allergen in controlled amounts and stimulates T regulatory cell populations. Which of the following is not a correct statement about this therapy?ANSWERRegulatory T cells stimulate T helper 1 cells.The level of IgG is increased as a result of the desensitization immunotherapy.As a result of the controlled injection of the allergen, the number of IgE molecules is increased.Regulatory T cells discourage T helper 2 cell activity.

Type III hypersensitivity is triggered by? Question 2Answer a. Mast cells and IgE b. Th cells c. K cells and IgG d. Deposition of antigen antibody complexes