Which of the following situations in a neuron results in action potentials that have extended depolarization phases?O None of these result in extended depolarization phase.O Compromising the inactivation mechanism in voltage-gated Na* channels.O Stimulating the voltage-gated K* channels.O Inhibiting the voltage-gated Na* channels.O Compromising the inactivation mechanism in voltage-gated K* channels.

Answered: Which of the following situations O…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

Which of the following situations in a neuron results in action potentials that have extended depolarization phases?
O None of these result in extended depolarization phase.
O Compromising the inactivation mechanism in voltage-gated Na* channels.
O Stimulating the voltage-gated K* channels.
O Inhibiting the voltage-gated Na* channels.
O Compromising the inactivation mechanism in voltage-gated K* channels.

Expert Solution

Step 1

Normally, the cells maintain a negative charge compared to the exterior of the cell. This charge difference is called its membrane potential.
During depolarization, the negative charge of the cell present interiorly becomes more positive temporarily. This shift in membrane potential from negative to more positive potential is seen during action potential. Due to an influx of sodium ions into the cell change in the charge takes place.