HISTOLOGY
BLOOD VESSELS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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when digesting a meal
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while sleeping
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while exercising
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in between meals
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Detailed explanation-1: -The capillary beds around the GI tract are open during a meal and closed between meals, during exercise, and during sleep (which is also between meals).
Detailed explanation-2: -Blood flow through the capillary beds is controlled by precapillary sphincters to increase and decrease flow depending on the body’s needs and is directed by nerve and hormone signals. Lymph vessels take fluid that has leaked out of the blood to the lymph nodes where it is cleaned before returning to the heart.
Detailed explanation-3: -The exchange of oxygen, nutrients, and waste between your blood and tissues also happens in your capillaries. This happens through two processes: Passive diffusion. This is the movement of a substance from an area of higher concentration to an area of lower concentration.