Question

Arrange the following events in the proper order in which they occur during an allergic response.

1 = Individual experiences symptoms
2 = Individual is sensitized to antigen
3 = IgE attaches to mast cells
4 = Antigen binds to IgE
1) 1, 2, 3, 4
2) 1, 3, 4, 2
3) 2, 3, 1, 4
4) 2, 3, 4, 1
5) 2, 4, 3, 1

Answer 1

The proper order of events in an allergic response is: 2, 3, 4, 1. First, an individual is sensitized to an antigen, then IgE attaches to mast cells. The antigen then binds to IgE, and finally, the individual experiences symptoms.

Step-by-step explanation:

1. 2
2. 3
3. 4
4. 1

During the allergic response, the proper order of events is as follows: 2) Individual is sensitized to antigen, 3) IgE attaches to mast cells, 4) Antigen binds to IgE, and 1) Individual experiences symptoms.

First, an individual is exposed to an allergen, which leads to the synthesis of IgE antibodies.

These IgE antibodies then bind to mast cells. Upon subsequent exposure to the allergen, the antigens bind to the IgE-primed mast cells, resulting in the release of chemical mediators and the individual experiencing allergy symptoms.