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27 August, 04:41

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

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  1. 27 August, 08:09
    0
    B) Active transport (using ATP)
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