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
a
b
c
d

Explanation:

Compression works by applying external pressure. This pressure causes blood vessels to narrow (vasoconstriction). When blood vessels narrow, less fluid can leak out of them into the surrounding tissues. Swelling after an injury is often due to fluid accumulation from damaged blood vessels. By narrowing blood vessels (not cutting off blood flow - which would be dangerous), compression helps reduce the amount of fluid that can contribute to swelling.

Answer:

D. It narrows blood vessels.