If fluid is leaving a capillary and entering the tissue, which of the following statements is true?Multiple ChoiceRed blood cells are able to leave the capillary.Plasma proteins are able to leave the capillary.Blood pressure is higher than osmotic pressure.This is the venous end of the capillary.The net pressure is in.
Question
If fluid is leaving a capillary and entering the tissue, which of the following statements is true?Multiple ChoiceRed blood cells are able to leave the capillary.Plasma proteins are able to leave the capillary.Blood pressure is higher than osmotic pressure.This is the venous end of the capillary.The net pressure is in.
Solution
The correct statement is: "Blood pressure is higher than osmotic pressure."
Here's why:
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Red blood cells are not able to leave the capillary. They are too large to pass through the capillary walls.
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Plasma proteins are also not able to leave the capillary. They are also too large to pass through the capillary walls.
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At the arterial end of a capillary, blood pressure is indeed higher than osmotic pressure. This is what drives the process of filtration, where fluid leaves the capillary and enters the tissue.
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This is not necessarily the venous end of the capillary. Fluid can leave a capillary and enter the tissue at the arterial end of the capillary, not just the venous end.
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The net pressure is not in. The net pressure is out, driving fluid out of the capillary and into the tissue.
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