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 wrongly describes material exchange between capillaries and tissues?
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Plasma is forced out of the capillaries at the arteriole end but blood cells remain in the lumen.
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Plasma enters the capillaries from the surrounding tissue at the venule end due to its lower blood pressure.
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100% of the fluid lost at the arteriole end will return at the venule end.
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Glucose and oxygen diffuse from the capillary into surrounding tissue down a concentration gradient.
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Explanation:
Detailed explanation-1: -Oxygen diffuses through the capillary wall, into the tissue fluid and the cells. Carbon dioxide diffuses from the cells into the tissue fluid, then across the capillary walls into the blood plasma . Glucose diffuses from the blood plasma, across the capillary walls to the tissue fluid, and then to the cells.
Detailed explanation-2: -At the venule end of the capillary, carbon dioxide and wastes are reabsorbed into the blood. This reabsorption is due to the osmotic pressure of the blood being higher than the hydrostatic pressure in the capillary.
There is 1 question to complete.