Question

Both mast cells and basophils ______.

Options

• are phagocytic

• circulate in the blood stream

• are found primarily in lymph nodes

• release histamine

Answer 1

Both mast cells and basophils release histamine.

Explanation:

Both mast cells and basophils are involved in allergic and inflammatory responses by releasing histamine, which contributes to vasodilation and increased vascular permeability. They are not phagocytic, mast cells are primarily found in tissues rather than circulating in the bloodstream (unlike basophils which circulate), and neither is found primarily in lymph nodes. Their main common function related to immune response is the release of histamine.