The Most Likely Mechanism Operating a Contractile Vacuole Is

Question

The most likely mechanism operating a contractile vacuole is
A)proton pumps actively moving water.
B)microtubules actively moving water molecules.
C)sodium pumps keeping the sodium ions on the outside of the membrane.
D)simple osmosis of water.
E)proton pumps forming an ion gradient.

Accepted Answer

Proton pumps forming an ion gradient create an osmotic gradient that facilitates the movement of water into the contractile vacuole, allowing it to expel excess water from the cell.