When the Na+/ K+ Pump Moves Its Bound Molecules of Na

question 22

Multiple Choice

When the Na+/ K+ pump moves its bound molecules of Na+ to the outside of the membrane, it

• A)immediately returns to the inside of the cell, ready to transport more Na+ back outside.
• B)pumps more K+ back into the cell than the amount of Na+ that just came out.
• C)binds to ATP to release the energy required to power the return trip.
• D)cannot return to the inside empty- handed, so it must bind two K+ first.
• E)releases the bound ATP to return to its normal confirmation.

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