The hormone-induced increases in water permeability of the distal tubule and collecting ducts is mediated by a(n) ________.
A) increase in aquaporin-2 activity
B) increase in aquaporin-3 activity
C) increase in paracellular permeability
D) decrease in "tightness" of tight junctions
E) decrease in paracellular permeability
Ans: A) increase in aquaporin-2 activity
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In which of the following parts of the nephron does aldosterone control the reabsorption of sodium ions?
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What process would be affected if a cell could not synthesize the enzyme RNA polymerase?
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The determinant of whether heart valves are open or closed is the pressure difference across them
Indicate whether the statement is true or false.