Question

What happens to blood vessels when caffeine is absent?

a) Peripheral blood vessels dilate, cerebral blood vessels constrict
b) Peripheral blood vessels constrict, cerebral blood vessels dilate
c) Both peripheral and cerebral blood vessels dilate
d) Both peripheral and cerebral blood vessels constrict

Answer 1

When caffeine is absent, peripheral blood vessels dilate while cerebral blood vessels constrict.

Step-by-step explanation:

When caffeine is absent, blood vessels in the body undergo changes that result in selective vasodilation in certain areas, while vasoconstriction occurs in others. Specifically, peripheral blood vessels, such as those in the skeletal muscles, heart, lungs, liver, and integument, will dilate. On the other hand, blood vessels leading to the kidneys, digestive system, and reproductive organs will constrict.