Renal tubule cells in the kidney medulla are constantly exposed to high extracellular osmolarity.How do they maintain normal cell volume?
A) They synthesize organic solutes as needed to match the osmolarity.
B) They synthesize water molecules through increased metabolism to offset volume loss.
C) They maintain a water-impermeable membrane.
D) They add or remove aquaporins as needed.
Correct Answer:
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