One Would Expect to Find the Highest Density of Aquaporins

question 29

Multiple Choice

One would expect to find the highest density of aquaporins in which of the following?

• A) the plasma membrane of guard cells
• B) the pits of a tracheid
• C) the plasma membrane of parenchyma cells in a ripe fruit
• D) the plasma membrane of a mature mesophyll cell in a leaf

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Definitions:

Repolarization

The process by which a cell's membrane potential returns to its resting state following depolarization.

Resting Membrane Potential

The electric potential difference across the membrane of a resting (non-active) cell, essential for the transmission of nerve impulses.

Plasma Membrane

The semipermeable membrane surrounding the cytoplasm of a cell, which regulates the movement of substances in and out of the cell.

Membrane Potential

The voltage difference across a cell's plasma membrane, crucial for the conduction of electrical signals in nerve and muscle cells.