Biology, 28.09.2019 15:20 sarahkuener
The cytoplasm of animal cells has a concentration of potassium ions (k ) as much as 20 times higher than the concentration outside the cell. how do cells move potassium ions against a concentration gradient, from a lower concentration to a higher one?
a. facilitated diffusion
b. active transport
c. osmosis
d. diffusion
Answers: 1
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