MUSCLE NERVE CARTILAGE BONE
PERIPHERAL NERVE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The voltage on a neuron cell that is required for an action potential to take place is called ____ and it has a value of ____ millivolts.
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threshold voltage, -55mV
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resting voltage, -70mV
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threshold voltage, -70mV
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resting voltage, -55mV
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Explanation:
Detailed explanation-1: -Action potentials are triggered when an initial depolarization reaches threshold. This threshold potential varies, but generally is about 15 millivolts above the cell’s resting membrane potential, occurring when the inward sodium current exceeds the outward potassium current.
Detailed explanation-2: -Threshold potential is the minimum potential difference that must be reached in order to fire an action potential. For most neurons in humans, this lies at-55 mV, so a signal to a resting cell must raise the membrane potential from-70 mV.
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