Question:
Larger influx of sodium ions into the nerve cell is called
Larger influx of sodium ions into the nerve cell is called
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Positive feedback in neurons accelerates sodium ion entry and ensures rapid propagation of action potentials.
Updated On: Jun 19, 2026
- Depolarization
- Action potential
- Re polarization
- Positive feedback regulation
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The Correct Option is D
Solution and Explanation
Step 1: Understand nerve impulse basics.
Nerve impulses involve rapid changes in membrane potential due to ion movement across the axonal membrane.
Step 2: Sodium ion influx.
Opening of voltage-gated Na\textsuperscript{+} channels causes a large influx of sodium ions, making the inside of the neuron more positive.
Step 3: Positive feedback effect.
This influx of Na\textsuperscript{+} causes neighboring channels to open, amplifying depolarization rapidly — a positive feedback mechanism.
Step 4: Difference from depolarization.
Depolarization is the result; the process of amplifying Na\textsuperscript{+} entry is specifically the positive feedback.
Step 5: Conclusion.
Thus, the larger influx of sodium ions into the nerve cell is described by Positive feedback regulation.
Nerve impulses involve rapid changes in membrane potential due to ion movement across the axonal membrane.
Step 2: Sodium ion influx.
Opening of voltage-gated Na\textsuperscript{+} channels causes a large influx of sodium ions, making the inside of the neuron more positive.
Step 3: Positive feedback effect.
This influx of Na\textsuperscript{+} causes neighboring channels to open, amplifying depolarization rapidly — a positive feedback mechanism.
Step 4: Difference from depolarization.
Depolarization is the result; the process of amplifying Na\textsuperscript{+} entry is specifically the positive feedback.
Step 5: Conclusion.
Thus, the larger influx of sodium ions into the nerve cell is described by Positive feedback regulation.
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