Which of the following situations in a neuron results in action potentials that

Question

Which of the following situations in a neuron results in action potentials that have extended depolarization phases? A. Inhibiting the voltage-gated Na+ channels. B. Stimulating the voltage-gated K+ channels. C. Compromising the inactivation mechanism in voltage-gated Na+ channels. D. Compromising the inactivation mechanism in voltage-gated K+ channels. E. None of the above. Which of the following situations in a neuron results in action potentials that have extended depolarization phases? A. Inhibiting the voltage-gated Na+ channels. B. Stimulating the voltage-gated K+ channels. C. Compromising the inactivation mechanism in voltage-gated Na+ channels. D. Compromising the inactivation mechanism in voltage-gated K+ channels. E. None of the above. Which of the following situations in a neuron results in action potentials that have extended depolarization phases? A. Inhibiting the voltage-gated Na+ channels. B. Stimulating the voltage-gated K+ channels. C. Compromising the inactivation mechanism in voltage-gated Na+ channels. D. Compromising the inactivation mechanism in voltage-gated K+ channels. E. None of the above.

Explanation / Answer

Depolarization phase happens when Na+ ions flows into the cell membrane during action potential of neuron followed by a repolarization phase wherein the K+. An extended depolarization phase is seen in case continued inflow of Na+ ions into the cells at the peak of action potential

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