Which of the Following Statements is False About Bulk Flow

Question

Which of the following statements is false about bulk flow?
A)It is driven primarily by pressure potential.
B)It is more effective than diffusion over distances greater than 100 μm.
C)It depends on a difference in pressure potential at the source and sink.
D)It depends on the force of gravity on a column of water.
E)It may be the result of either positive or negative pressure potential.

Accepted Answer

Bulk flow is not dependent on the force of gravity on a column of water. It is driven primarily by pressure potential and depends on a difference in pressure potential at the source and sink. It is usually more effective than diffusion over longer distances, and it can result from either positive or negative pressure potential. However, gravity may affect the direction of bulk flow in some instances (such as in water transport in plants).