Lussuon 8) Each of the following sentences describes the process involved in uhe

Question

Lussuon 8) Each of the following sentences describes the process involved in uhe production of an action potential. Provide the most appropriate term I phrase number for each of the missing spaces in the table below. During the resting state all voltage-gated Na' and K' channels are is at resting membrane potential of approximately _(B)mV. In order to generate an action potential, a stimulus must be able to bring the membrane potential to a certain level termed the threshold, for most n occurs around_(C)_mV. eurons this Inversely, if a stimulus action potential won't be generated. In other words, an action potential either occurs completely or it does not occur at all. This characteristic of an action potential is known as the _(D)_principal. is unable to bring the cell membrane to the threshold, an When membrane potential of the axon reaches threshold, _(E)_channels open, creating a buildup of positive charges inside of the cell, this signifies the commencement of the depolarization phase. During the depolarization phase the membrane potential rises from the threshold level to_(F)_ mV Shortly after the depolarization phase. _(G)_commences. This phase is characterized by _(H)_ channels closing and_(_channels opening, in doing so the plasma membrane is restored to its resting state. Upon returning to the resting state, there is a short period of time known as the _(U) in which an excitable cell cannot generate another action potential. H-

Explanation / Answer

The terms/ phrases are given below

A. Closed

B. -70mV

C. -50 to -55mV

D. All or none principle

E. Na+

F. +30mV

G. Repolarization

H. Na+

I. K+

J. Refractory period.

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