Question

question 7 of 10
which voltage is the threshold potential?
-70 mv
-95 mv
-55 mv
+40 mv

Explanation:

Threshold potential is the critical level to which a membrane potential must be depolarized to initiate an action potential. In neurons, the resting membrane potential is around -70 mV. The threshold potential is less negative than the resting potential. -95 mV is more negative (hyperpolarized) than the resting potential. +40 mV is the peak of the action potential (depolarized state). -55 mV is the value at which voltage - gated sodium channels open to cause further depolarization (threshold for action potential initiation).

Answer:

-55 mV