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AP Biology/Unit 2: Cell Structure and Function
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Sodium-Potassium Pump Net Ion Flow

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The sodium-potassium pump transports 3 Na⁺ ions out of a cell and 2 K⁺ ions into the cell during each cycle of operation. If the pump completes 1,000 cycles per second, which of the following statements correctly describes the net movement of ions?

A

2000 ions are net moved out per second.

B

1000 ions are net moved out per second.

C

There is a net movement of 1000 ions into the cell per second.

D

No net movement of ions occurs.

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