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EXPH 386 WVU Exam 4 Questions and Answers
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EXPH 386 WVU Exam 4 Questions and Answers
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EXPH 386 WVU Exam 45 important functions of CV system - Answer-1. Deliver O2 to active tissues
2. Return Deoxy blood to lungs
3. Transports heat, by-product of cellular metabolism, from core to skin
4. Delivers fuel nutrients to active tissues
5. Transports hormones
The heart is a duel pump T/F - Answer-T
Pulmonary Circulation - Answer-Between the heart and the lungs. Carries deoxy blood away from heart
to the lungs and then returns oxygenated blood back to heart.
Systemic circulation - Answer-Between the heart and the rest of the body. Carries oxygenated blood
from the heart to the body and then returns deoxygenated blood back.
Function of the heart - Answer-Pump blood
Passive filling of ventricles - Answer-Governed by pressure gradients. ~90%
, Active filling of vetricles - Answer-Atrial contraction. ~7% at rest
Pipes of CV system - Answer-Arteries
Arterioles
Capillaries
Venules
Veins
Arteries - Answer-thick walled, high pressure
smooth muscle and endothelial cells
Arterioles - Answer-smaller arteries. constrict or relax changing the resistance to blood flow. Also
contain smooth muscle
What is the other name for arterioles? - Answer-resistance vessels
Venules - Answer-small veins that collect deoxy blood from capillaries
capillaries - Answer-* single layer of endothelial cells line capillary wall
* NO smooth muscle
* Reduces diameter to allow only one blood cell
*Increased pressure
Whats the name of the branch off the arteriole where the capillary is about to begin? - Answer-
metarteriole
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