D) If during the generation of an action potential in the skeletal muscle cell the membrane potential approaches +65 mV, membrane permeability for which ion likely plays a major role in membrane depolarization? Explain your choice.

D) If during the generation of an action potential in the skeletal muscle cell the membrane potential approaches +65 mV, membrane permeability for which ion likely plays a major role in membrane depolarization? Explain your choice.

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

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter4: Principles Of Neural And Hormonal Communication

Section: Chapter Questions

Problem 1SQE: Answer the following questions regarding conduction of action potentials using the velocities given...

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Concept explainers

Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.

Question

Nernst (equilibrium)
Potential (mV)
- 6.lol
0.07
0.125
D.094
lon
Intracellular
Extracellular
Concentration (mM)
Concentration (mM)
K*
155
4
Nat
12
145
Ca**
104
1.5
4
120
D) If during the generation of an action potential in the skeletal muscle cell the membrane potential
approaches +65 mV, membrane permeability for which ion likely plays a major role in membrane
depolarization? Explain your choice.

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