Question

facilitated diffusion occurs
multiple choice
into the cell only
out of the cell only.
in either direction depending on the temperature.
in either direction depending on the concentration gradient of the molecule.
in either direction depending on the size of the molecule.

Explanation:

Facilitated diffusion is a passive - transport process. Molecules move across the cell membrane with the help of transport proteins. The direction of movement is determined by the concentration gradient of the molecule, from an area of higher concentration to an area of lower concentration, and it can occur in either direction based on this gradient.

Answer:

D. in either direction depending on the concentration gradient of the molecule