Question

Which process moves an ion across a cell membrane against the concentration gradient?
A. diffusion
B. exocytosis
C. facilitated diffusion
D. active transport

Answer 1

d

Answer 2

to go against the gradient, it requires energy, which is what active transport is.

Answer 3

Thanks. :)

Answer 4

np, just close it after ur done.

Answer 5

I always do. xD