Question

Your adventure learning about poison ivy is an example of which type of hypersensitivity?

1) Type I
2) Type II
3) Type III
4) Type IV

Answer 1

The adventure of learning about poison ivy is an example of type IV hypersensitivity, specifically contact dermatitis. During the first exposure, sensitization occurs, leading to the production of memory helper T cells. Upon secondary exposure, these memory cells are reactivated, causing an inflammatory response.

Step-by-step explanation:

The adventure of learning about poison ivy is an example of type IV hypersensitivity. Poison ivy exposure can cause contact dermatitis, which is a delayed hypersensitivity reaction. During the first exposure, a sensitization process occurs, leading to the production of memory helper T cells. Upon secondary exposure, these memory cells are reactivated, resulting in the production of inflammatory cytokines that stimulate an inflammatory response at the exposed site.