Question

Please match the description to the type of hypersensitivity. 1. acute reaction to an allergen mediated by IgE, mast cells, basophils, and histamine (Click to select) 2. a reaction mediated by T cells and the effector cells enlisted by them. Generally, this reaction takes a day or two to develop after exposure to the provoking antigen (Click to select) 3. mediated by IgG antibody-antigen complexes, which are deposited in basement membranes of some organs and invoke an inflammatory response (Click to select) 4. a reaction involving IgG and IgM antibodies which target cells and activate complement, which in turn lyses host cells Click to select)

Answer 1

1.Acute reaction to an allergen mediated by IgE,mast cell, basophils and histamine :---Immediate hypersensitivity.

2. A reaction mediated by T cell and the effector cell enlist by them, Generally this this reaction takes a day or two to develop after exposure to the provoking antigen:--delayed hypersensitivity (also called Cell mediated hypersensitivity)

3.Mediated by IgG antibody antigen conplex, which deposited in the basement membranes of some organs and invoke an inflammatory response:--Immune complex mediated hypersensitivity.

4.A reaction involving IgG and IgM antibodies which target cells and activate complement, which in turn lyses the host cell :-- Antibody mediated hypersensitivity