A substance moves across a cell membrane from a higher concentration to a lower concentration, without using the cell’s energy or the use of membrane proteins, this is due to _________.

Question

a
sodium potassium pumps
b
facilitated diffusion
c
endocytosis
d
diffusion

Answer 1

The correct answer is d) diffusion.

Diffusion is the process by which a substance moves from an area of higher concentration to an area of lower concentration without the use of cellular energy or membrane proteins.