The threshold for firing occurs when the electrical charge within the nerve cell reaches about
A)-10 millivolts.
B)-50 millivolts.
C)+100 millivolts.
D)+10 millivolts.

Question

Quizplus · Accepted Answer

The threshold for firing, also known as the action potential threshold, in a nerve cell is typically around -50 to -55 millivolts. This is the critical level to which a membrane potential must be depolarized to initiate an action potential.

The Threshold for Firing Occurs When the Electrical Charge Within