Moderate

For every two K+ ions transported inward a neutron cell., how many Na+ ions are transported outside:

Correct answer: C. Three

  • A. One
  • B. Two
  • C. Three
  • D. Twenty

Explanation

The sodium-potassium pump moves three Na+ ions out of the neuron for every two K+ ions it moves inward. This unequal exchange helps maintain the resting membrane potential.

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