Action potential +40 Failed nitlations ss Threshold Resting state -70 Stimulus 1 Refractory period 3. Time (ms) The refractory period or the hyperpolarization phase of an action potential in a neuron, is due to which of the following ? the prolonged opening of Na+ channels the closure of Na+ channels the closure of K+ channels the prolonged opening of K+ channels Repolarization Voltage (mV)
Action potential +40 Failed nitlations ss Threshold Resting state -70 Stimulus 1 Refractory period 3. Time (ms) The refractory period or the hyperpolarization phase of an action potential in a neuron, is due to which of the following ? the prolonged opening of Na+ channels the closure of Na+ channels the closure of K+ channels the prolonged opening of K+ channels Repolarization Voltage (mV)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter39: Information Flow And The Neuron
Section: Chapter Questions
Problem 8TYK: Which of the following statements best describes saltatory conduction? a. It inhibits direct...
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Hyperpolarization is when the membrane potential is more negative than the membrane spot.
An action potential begins when depolarization increases the membrane potential enough to cross the threshold value of -55mV. This is followed by the opening of the Na+ gated channels which allows for the steep rise in potential upto +44mV. After a short time the sodium channels self inactivate with the potassium voltage gated channels opening to cause the rushing out of the potassium down it's electrochemical gradient. They remain open a little longer than is necessary which causes the undershoot to occur. Eventually, they close and the membrane potential returns back to normal.
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