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
A) 1, 2, 3, 4
B) 1, 3, 4, 2
C) 2, 3, 1, 4
D) 2, 3, 4, 1
E) 2, 4, 3, 1

Question

Quizplus · Accepted Answer

In order for an individual to experience symptoms of an allergic response, they must first be sensitized to the antigen (2). This sensitization causes the individual's body to produce IgE antibodies, which attach to mast cells (3). When the individual is exposed to the antigen again, it binds to the IgE on the mast cells (4), triggering the release of histamine and other chemicals that cause the allergic response symptoms (1). Therefore, the correct order is 2, 3, 4, 1.

Arrange the Following Events in the Proper Order in Which