Answered: The equilibrium potential for K* in…

The equilibrium potential for K* in neurons is ordinarily nearest- A. the equilibrium potential for Na* B. resting potential C. reversal potential for the EPSP D. the peak of the action potential

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter3: The Plasma Membrane And Membrane Potential

Section: Chapter Questions

Problem 4TAHL

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Question

The equilibrium potential for K* in neurons
is ordinarily nearest-
A. the equilibrium potential for Na*
B. resting potential
C. reversal potential for the EPSP
D. the peak of the action potential

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Saltatory conduction (a) requires more energy than continuous conduction (b) occurs in unmyelinated neurons (c) occurs when the action potential jumps from one node of Ranvier to the next (d) slows transmission of an impulse (e) depends on the action of GABA
Action potentials occur when ______. a. potassium gates close b. a stimulus pushes membrane potential to threshold c. sodium-potassium pumps become active d. neurotransmitter is reabsorbed
Draw and label an action potential, indicating the ion movements responsible for the rising phase and the falling phase.
What stage of the action potential is illustrated by the set up shown? interstitial fuid axon cytoplasm interstitial fiuid Resting potential Hyperpolarization O Depolarization Repolarization K'charnel
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channels are specifically attuned to the action The voltage-gated potential threshold. O cr Na* O K* O Ca2+
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The phases and ionic basis of an action potential. Membrane potential (mv) +30 -55 -70 Na channels open ↑ K Action potential -Pha channels open .PK Time (msec) (b) Permeability changes for Na* and K* during an action potential Membrane permeability (P)
The rising phase of the action potential is due to: Na+ influx through voltage-gated Na+ channels. Na+ efflux through voltage-gated Na+ channels. K+ influx through voltage-gated K+ channels. K* efflux through voltage-gated K+ channels. O Na+ influx through Na+ leak channels. Na efflux through Na+ leak channels. K+ influx through K+ leak channels. O K+ efflux through K+ leak channels.
A graded potential that achieves threshold leads to the generation of an action potential. Which one of the following statement/s regarding graded and action potentials is/are true? O graded potentials result from the opening of chemically gated sodium channels O action potentials result from the opening of voltage gated sodium channels O graded potentials result from the opening of calcium gated channels and action potentials result from the opening of sodium gated channels a and b Next