Question

Identify which of the following statements below is characteristic of a Type I hypersensitivity reaction.

a. Cell mediators typically include mast cells, basophils, and eosinophils.
b. Sensitized T cells (not antibodies) are typically responsible for production of symptoms.
c. IgG and IgM are typically the antibodies that cause initiation of this type of reaction.
d. None of the above. They are all characteristic of a Type I reaction.

Answer 1

The characteristic of a Type I hypersensitivity reaction is that cell mediators typically include mast cells, basophils, and eosinophils.

Step-by-step explanation:

The characteristic of a Type I hypersensitivity reaction is that cell mediators typically include mast cells, basophils, and eosinophils. This means that these cells are involved in the immune response in Type I hypersensitivity reactions.

Sensitized T cells are not typically responsible for production of symptoms in Type I hypersensitivity reactions, so option b is incorrect. IgG and IgM antibodies are not typically the antibodies that cause initiation of Type I hypersensitivity reactions, so option c is also incorrect. Therefore, the correct answer is a. Cell mediators typically include mast cells, basophils, and eosinophils.