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  3. 1. what does vasoconstriction or vasodilation do t

1. What does vasoconstriction or vasodilation do to venous return and cardiac output? How does this occur? 2....

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Medical Sciences

1.What does vasoconstriction or vasodilation do to venous return andcardiac output? How does this occur?

2. How would viscosity change as the number of red blood cellsincrease or decrease?

3. Give an example of when the size of a blood vessel's lumenwould change.

4. Would vasoconstriction or vasodilation make the lumensmaller? What happens to the resistance when the lumen getssmaller? What happens to blood pressure?

Answer & Explanation Solved by verified expert
3.8 Ratings (341 Votes)
1 ANSWER Vasoconstriction increases the pressure on the veins as it does in an artery But vasoconstriction in arteries would decrease the blood flow whereas vasoconstriction in veins would    See Answer
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