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parkmel parkmel
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11 years ago
It has a resting membrane potential of -70mV. The threshold potential of this neuron is -55mV. What would the response of the neuron be to a stimulus that results in a membrane potential of -40mV?

I know that the sodium gates would open and the potassium gates would close. Thus increasing the membrane potential. I don't understand what will happen though once the membrane potential goes past the threshold.Any help will be greatly appreciated  Slight Smile
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#1
Valued Member
11 years ago
parkmel, what did you figure out about this?
Sunshine ☀ ☼
parkmel Author
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#2
11 years ago
I figured out that the stimulus would cause the sodium gates to open, allowing the sodium to flow into the membrane (resulting in a more positive membrane potential). Once the membrane potential hit threshold (-55 mV), the sodium flooded in, bringing the charge all the way up to -40 mV. The process from hitting the threshold all the way to the -40 mV membrane potential is referred to as depolarization. After this repolarization would occur as the membrane would go back down to resting membrane potential...
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