PATHOLOGY MCQ
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: -The walls of the alveoli share a membrane with the capillaries. That’s how close they are. This lets oxygen and carbon dioxide diffuse, or move freely, between the respiratory system and the bloodstream. Oxygen molecules attach to red blood cells, which travel back to the heart.
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