Multiple Choice
How many nephrons does each kidney typically contain?
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25. The Urinary System
The Nephron
Multiple Choice
Aquaporins allow which substance to pass through the descending limb of the loop of Henle?
A
Water
B
Glucose
C
Sodium ions
D
Urea
Verified step by step guidance1
Understand the function of aquaporins: Aquaporins are specialized protein channels in cell membranes that facilitate the transport of water molecules across the membrane.
Identify the location: The descending limb of the loop of Henle is part of the nephron in the kidney, which plays a crucial role in concentrating urine.
Recognize the permeability of the descending limb: The descending limb is highly permeable to water but not to solutes like sodium ions, glucose, or urea.
Connect aquaporins to water transport: Since aquaporins specifically facilitate the movement of water, they allow water to pass through the descending limb of the loop of Henle.
Conclude the role of aquaporins: Therefore, aquaporins in the descending limb of the loop of Henle primarily allow water to pass through, contributing to the reabsorption process in the kidney.
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