APPLIED RADIOLOGICAL ANATOMY

ANATOMY

MUSCULOSKELETAL AND SOFT TISSUE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Why does the cardiovascular system vasodilate and vasoconstrict blood vessels (arteries and arterioles in this instance)?
A
To move blood to where it is needed
B
To move blood away from areas of low demand
C
To help regulate body temperature
D
To make the heart beat faster
Explanation: 

Detailed explanation-1: -Blood vessels also contain muscle, and that muscle controls just how wide or narrow your blood vessels are at any given time. When blood vessels get wider, that’s vasodilation. The opposite process, when blood vessels constrict and get narrower, is called vasoconstriction.

Detailed explanation-2: -Vasodilation is a mechanism to enhance blood flow to areas of the body that are lacking oxygen and/or nutrients. The vasodilation causes a decrease in systemic vascular resistance (SVR) and an increase in blood flow, resulting in a reduction of blood pressure.

Detailed explanation-3: -Vasoconstricting and vasodilating medications work in different ways. While vasoconstricting medications tighten your blood vessels to raise blood pressure, vasodilating medications dilate or widen them to improve blood flow and lower blood pressure.

Detailed explanation-4: -Blood vessels contain receptors called baroreceptors. These constantly monitor blood pressure and trigger vasoconstriction or vasodilation as needed.

There is 1 question to complete.