What causes cell walls to relax?
exercise sweating adding heat Energy dilation heat or cold heat Dehydration
A B C D E F G H
When oxygen level decreases, dilatation of the blood vessels occurs.
Decreased oxygen levels cause blood vessels to dilate and cell walls to relax.
What causes cell walls to relax? (A) exercise (B) sweating (C) adding heat (D) Energy (E) dilation (F) heat or cold (G) heat (H) Dehydration