Which of the Following is an Example of a Type

Question

Which of the following is an example of a type I hypersensitivity reaction?
A) watery eyes after exposure to animals
B) destruction of red blood cells after an incompatible blood transfusion
C) farmer's lung
D) immune complexes accumulation in the kidneys
E) the tuberculin response

Accepted Answer

Type I hypersensitivity reactions involve an immediate response mediated by IgE antibodies and mast cells. Watery eyes after exposure to animals is a common symptom of allergic reactions that occur via this mechanism.