[Campbell Biology P.840] According to the text, which of the following conditions would decr... | Practice Question

According to the text, which of the following conditions would decrease the permeability of aquaporin channels?

  • A: A decrease in cytosolic Ca2+ concentration.
  • B: An increase in cytosolic pH.
  • C: An increase in cytosolic Ca2+ concentration.
  • D: An increase in turgor pressure within the cell.

Explanation

The text explicitly states: 'Their permeability is decreased by increases in cytosolic Ca2+ or decreases in cytosolic pH.' Therefore, an increase in cytosolic Ca2+ concentration decreases aquaporin permeability.