Question

how does compression reduce swelling after an injury? a. it cools the injured tissue. b. it keeps the injury elevated. c. it cuts off blood flow. d. it narrows blood vessels. please select the best answer from the choices provided.

Explanation:

Compression applies pressure which causes blood vessels to narrow (vasoconstriction). This reduces the amount of fluid that can leak out of the blood vessels into the surrounding tissues, thereby reducing swelling. Cooling is related to cold - therapy, elevation is a separate method for reducing swelling, and cutting off blood flow completely is not the goal of compression for reducing swelling.

Answer:

D. It narrows blood vessels.