1. Define vasoconstriction and vasodilation. Are these processes voluntary or involuntary? What tunic would contribute to...
1. Define vasoconstriction and vasodilation. Are these processes voluntary or involuntary? What tunic would contribute to vasomotion?
2. How are low-density lipoproteins related to the formation of thrombi or emboli?
Homework Answers
Answer:
1. Vasoconstricion is defined as decrease in the diameter of the blood vessel due to contraction of the smooth muscles in the vessel wall.
Vasodilation is defined as increase in the diameter of the blood vessel due to relaxation of the smooth muscle in the vessel wall.
These processes are involuntary regulated by the vasomotor center of the brainstem. Tunica media of the vessel contributes to vacomotion.
2. Low-density lipoproteins causes mobilization of the lipids from the liver towards periphery, increasing the free fatty acid level in the blood, predisposing for the formation of thrombi in the vessels.
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