PATHOLOGY MCQ
URINARY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The mechanism of water reabsorption by the renal tubules is
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renal columns.
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renal pyramids.
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osmosis
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active transport
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Explanation:
Detailed explanation-1: -Water reabsorption is by osmosis through water channels in the membrane. These water channels consist of a family of proteins called aquaporin. At least seven different aquaporin isoforms are expressed in the kidney.
Detailed explanation-2: -Answer and Explanation: In the kidneys, water moves by osmosis from tubules called nephrons to the bloodstream. The nephrons are therefore hypotonic relative to the blood.
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