PATHOLOGY MCQ
BLOOD VESSELS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Filtration dominates at the arterial end of a capillary bed, and is driven by osmotic pressure.
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Filtration dominates at the arterial end of a capillary bed, and is driven by hydrostatic pressure.
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Filtration dominates at the venous end of a capillary bed, and is driven by osmotic pressure.
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Filtration dominates at the venous end of a capillary bed, and is driven by hydrostatic pressure.
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Detailed explanation-1: -Filtration dominates at the arterial end of a capillary bed, and is driven by hydrostatic pressure. Filtration dominates at the venous end of a capillary bed, and is driven by osmotic pressure.
Detailed explanation-2: -Because of the gradient of the hydrostatic pressure along the capillary, filtration usually occurs at the arterial end of the capillary and reabsorption at its venous end.
Detailed explanation-3: -Osmotic pressure is determined by the difference in the proteins present in the blood and interstitial tissue. Hydrostatic pressure is higher at the arterial end, and materials are pushed out. Hydrostatic pressure is lower than osmotic pressure at the venule end, and materials are moved into the capillary.
Detailed explanation-4: -Why do fluids leave the capillaries at the arterial end?-The net filtration pressure of the blood is higher at the arterial end than it is at the venous end.