The given graph depicts the steps involved in the action potential and propagation of nerve impulse. The step where K+ channels are opened to allow K+ on the inside of neuron to rush out of the cell is labelled as
Correct answer: C. Option C
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
The correct answer is Option C. During the action potential, the phase where K+ channels open is known as repolarization. In this phase, K⁺ ions flow out of the neuron, restoring the negative charge inside the cell after depolarization. A and D represent resting membrane potential, and B represents depolarization; in both, potassium channels remain closed.
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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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