Permeability changes during the AP Flashcards
(6 cards)
1
Q
which channels open and close quickly
A
sodium channels
2
Q
what is the role of sodium channels during an AP
A
to give depolarisation
3
Q
which channels open and close slowly
A
potassium channels
4
Q
what is the role of potassium channels during an AP
A
to give repolarisation and overshoot
5
Q
why can APs not fire infinitely fast
A
because they have a refractory period when the channels are inactivated and not reset
6
Q
what feature allows APs to signal over long distances
A
APs can self-propagate
