Question

reaction to an incompatible organ transplant is an example of hypersensitivity

a)TYPE 1

B)TYPE 2

C)TYPE3

D)TYPE4

E)Humoral Mediated

2. Superantigens are

a)extremely large antigen molecules

b)all very large poysaccharides

c) cause a weak reaction of the immune system

d) cause a large response of the immune system

e) attach non specifically to B-CELLS receptors

Answer 1

1) D)Type 4

Type IV hypersensitivity is often called delayed type hypersensitivity as the reaction takes two to three days to develop. Unlike the other types, it is not antibody mediated but rather is a type of cell-mediated response.

2) D) cause a large response of the immune system

Superantigens are bacterial proteins that generate a powerful immune response by binding to Major Histocompatibility Complex class II molecules on antigen-presenting cells and T cell receptors on T cells.

They don't attached to B cell receptors like any other antigens.

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