Inflammation is characterized in part by redness and swelling. In inflammation,_______ increases blood flow to affected tissues (producing redness) and causes fluid to leak out of the blood vessels and into the tissue (producing swelling).

Question

Quizplus · Accepted Answer

Histamine is released by cells in response to injury and in allergic and inflammatory reactions, causing contraction of smooth muscle and dilation of capillaries. This increases blood flow to the affected tissues, leading to redness, and causes fluid to leak out of the blood vessels, leading to swelling.

Inflammation Is Characterized in Part by Redness and Swelling