If the partial depolarization arriving at an axon is sufficiently large,typically ___ or more,it can cause normally closed sodium ion channels to open.
A)5mV
B)40mV
C)30mV
D)10mV

Question

Quizplus · Accepted Answer

The threshold for causing normally closed sodium ion channels to open and initiate an action potential is typically around -55mV, which is about 10-15mV more positive than the resting membrane potential of -70mV. This corresponds to a change of approximately 10mV or more from the resting potential.

If the Partial Depolarization Arriving at an Axon Is Sufficiently