If the concentration of phosphate in the cytosol is 2.0 mm and the concentration of phosphate in the surrounding fluid is 0.1 mm, how could the cell increase the concentration of phosphate in the cytosol?

active transportation is required to increase the concentration.

Explanation:

In particular condition, the quantity of phosphate in the cytosol in 2.0 mM and the quantity of phosphate in the adjacent fluid is 0.1 mM. Therefore, phosphate concentration within the cell is lower. If we have to maximize phosphate content in the cytosol, in order to achieve the cytosol, the phosphate from surrounding fluid must be transferred against the concentration gradient. Thus active transportation is required to increase the concentration.

the denominator has a very specific role.

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