Question

water is absorbed in the intestine through which of the following processes?
a. facilitated transport
b. simple diffusion
c. active transport
d. active diffusion

Explanation:

Water absorption in the intestine occurs through simple diffusion. Simple diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration without the need for energy or a carrier protein. Water can passively move across the intestinal membrane in this way. Facilitated transport requires a carrier protein, active transport requires energy (ATP), and "active diffusion" is not a standard transport mechanism.

Answer:

B. Simple diffusion