1- Where is the action potential initially generated?
2- What happens to voltage-gated sodium channels at threshold?
3- What happens if there is a weak stimulus at the initial segment, and threshold is not reached?
4- What are the names of the two gates on the voltage-gated sodium channels?
5- Just after the peak of the depolarization phase, what happens to the activation and inactivation gates of
voltage-gated sodium channels?
6- What happens to the membrane potential during the repolarization phase of the action potential, and
what causes this change?
7- At the end of the action potential’s depolarization phase, the membrane potential is about __
mV.
8- The depolarization phase of the action potential is primarily due to a change in membrane permeability
to _.
9- If the membrane reaches the trigger point, known as threshold, it will generate a(n) _.
Sample Solution
