HISTOLOGY
BLOOD VESSELS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Oxygen and carbon dioxide are transported between the blood and interstitial fluid by way of
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exocytosis and endocytosis by endothelial cells
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diffusion from areas of higher concentration to lower concentration
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pinocytosis using fluid-filled vesicles
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active transport (using ATP) by protein carriers of endothelial cells
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Explanation:
Detailed explanation-1: -Internal respiration is the process of diffusing oxygen from the blood, into the interstitial fluid and into the cells. Waste and carbon dioxide are also diffused the other direction, from the cells to the blood.
Detailed explanation-2: -Once the venous blood returns to the lungs, the carbon dioxide diffuses out of the bloodstream, through the capillaries, and into the alveoli from where it is expelled, during which time oxygen simultaneously binds with hemoglobin to be carried back to the tissues.
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