action potential Flashcards
1
Q
when a neuron is at rest what is its charge?
A
- a resting neuron is negatively charged
2
Q
how does a neuron become stimulated?
A
- ions enter and leave the neuron
3
Q
when does the action potential begin?
A
- when the neuron goes from -70mv to -55mv
4
Q
what happens to the ions after the neuron gets to -55mv?
A
- continue to switch and depolarise neuron (becomes less negatively charged inside)
5
Q
at what mv does the action potential fire?
A
- at +35/40 mv the AP fires and signal propagates
6
Q
what happens to the ions after the action potential fires?
A
- they begin to switch again and re-polarise neuron (becomes more negatively charged on the inside again)
7
Q
when is the neuron hyper-polarised?
A
- neuron is hyper-polarised (extra negatively charged inside) in refactory period before it returns to resting state
