VASCULAR
THE NEPHRON
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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During which process is 99% of the water returned to the blood vessels?
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Filtration
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Reabsorption
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Secretion
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None of the above
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Explanation:
Detailed explanation-1: -Reabsorption is the movement of water and solutes from the tubule back into the plasma. Reabsorption of water and specific solutes occurs to varying degrees over the entire length of the renal tubule. Bulk reabsorption, which is not under hormonal control, occurs largely in the proximal tubule.
Detailed explanation-2: -On average, 180L of water is filtered by the kidneys daily. However, only 1.5-2L actually ends up being excreted as urine. This means almost 99% of the water filtered is either reabsorbed into the circulation or enters the interstitium.
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