Place the events leading to nerve impulse conduction in order, starting when the neuron is at rest. K+ ions diffuse outward, repolarizing the membrane Neuron receives stimulation, causing local graded potentials, which may sum to reach threshold Action potentials occur sequentially along the length of the axon. Na+ channels in the axon hillock of the axon open and Na+ ions diffuse inward, depolarizing the At rest, nerve cell membrane maintains resting potential. Diffusion of Na+ and K+ down their con Potassium channels in the membrane open. The resulting action potential causes an electric current that stimulates adjacent portions of the me
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The neuron is at rest, and the resting membrane potential is maintained by the distribution of Na+ and K+ ions across the cell membrane. Show more…
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Put the following steps of impulse conduction in order Depolarization of the axon membrane occurs Threshold stimulus is received Sodium channels open, sodium ions diffuse inward The resulting action potential causes an electrical current that stimulates adjacent portions of the axon membrane and a series of action potentials occur Repolarization of the axon membrane occurs Potassium channels open and potassium ions diffuse out of the axon
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Describe how a nerve impulse is conveyed through a single neuron, including all structures and ions involved. Also, describe how a neuron is optimized to convey nerve impulses. In addition, review the process by which nerve impulses are propagated between neurons, including all structures, chemicals, and ions involved. Finally, explain why an ion-release system (like the calcium-release trigger for muscle contraction) would not work for conveying nerve impulses.
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