The Movement of Water Between Fluid Compartments is Regulated Primarily

Question

The movement of water between fluid compartments is regulated primarily by
A)diffusion and osmosis.
B)hydrostatic pressure and osmotic pressure.
C)pinocytosis and phagocytosis.
D)active and passive transport.

Accepted Answer

The movement of water between fluid compartments is regulated by hydrostatic pressure (pressure exerted by the fluid itself) and osmotic pressure (pressure generated by the movement of water across a semipermeable membrane from an area of high concentration to an area of low concentration). Diffusion and osmosis are mechanisms of transport, but they are not regulatory processes. Pinocytosis and phagocytosis are forms of endocytosis, which involve the uptake of large molecules and particles by cells, but they are not involved in the regulation of water movement between fluid compartments. Active and passive transport are mechanisms of transport, but they do not directly regulate water movement between compartments.