PATHOLOGY MCQ
BLOOD VESSELS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following is/are true of how shunt vessels respond when the body is an extremely cold environment?One, some or all answers could be correct?
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they constrict (narrow)
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blood flow is increased to the skin (extremities)
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they dilate (widen)
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blow flow is diverted away from the skin (extremities)
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Explanation:
Detailed explanation-1: -Humans exhibit two major physiological responses to cold exposure. Peripheral vasoconstriction limits heat loss. Shivering, physical activity, or both increase heat production.
Detailed explanation-2: -Vascular shunting is the process of redistribution of blood. Blood diverted to active areas and diverted away from inactive areas. Occurs through vasoconstriction (narrowing of arteries) and vasodilation (widening of arteries). Active areas during exercise = brain and working muscles.
There is 1 question to complete.