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OpenStudy (anonymous):
Which mechanism requires energy? A.diffusion of oxygen into a red blood cell B.diffusion of ions through a potassium channel C.osmosis D.exocytosis
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OpenStudy (malcolmmcswain):
I believe it's D, exocytosis, as ATP (Adenine Triphosphate) must be expended during the process.
OpenStudy (anonymous):
Thx you so much hehehe
OpenStudy (malcolmmcswain):
No problem!
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