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Biology 4 Online
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

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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