Maintenance of normal resting potential via movement of K+ inside the cell and na+ out is a/an ___________ process?
Correct answer: A. Active
- A. Active
- B. Passive
- C. Diffusional
- D. None of these.
Explanation
The sodium-potassium pump uses ATP to move 3 Na+ out of the neuron and 2 K+ into it, both against their concentration gradients. Because energy is required for this movement, it is active transport. The likely alternative is passive or diffusional transport, which applies to ion movement through channels down a gradient, not to the pump.
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About Neurons and Nerve Impulse
Neurons receive and transmit information through dendrites, the cell body and axons. The topic explains resting potential, depolarization, repolarization, refractory periods and saltatory conduction, followed by synaptic transmission through neurotransmitters. An action potential is distinct from the graded potential produced at a receptor.
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