How can we say our cells are bathed in isotonic fluids if the concentration of potassium ions inside cells does not equal the concentration of potassium ions outside cells? In fact, why don't our cells burst? A.The concentration of potassium ions inside cells DOES equal the concentration of potassium ions outside cells. B. Potassium ions are constantly pumped inside cells in order to equal the concentration of potassium ions outside cells. C. The concentration of potassium ions inside cells only "matters" to potassium ions and does not affect osmosis because water is measuring its own concentration compared to solutes. D. The concentration of potassium ions inside cells exactly equals the concentration of sodium ions outside cells. E. The concentration of potassium ions inside cells is much less than the concentration of potassium ions outside cells, so cells lose water instead of bursting.
Added by Karl V.
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This is because cells actively pump potassium ions in and out to maintain a balance. Show more…
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