Place these steps of the action potential in the correct order.
1)Sodium ions channels return to the resting state and repolarization continues.
2)Voltage-gated sodium ion channels activate,sodium ions enter,and the axon section depolarize
3)As potassium ion channels return to resting state,the axolemma may hyperpolarize before retur to the resting membrane potential.
4)A local potential depolarizes the axolemma of the trigger zone to threshold.
5)Sodium ion channels inactivate,and voltage-gated potassium ion channels activate,so sodium i stop entering and potassium ions leave,beginning repolarization.
A)2,4,5,1,3
B)4,2,5,1,3
C)4,2,3,5,1
D)4,2,1,3,5

Question

Place these steps of the action potential in the correct order. 
1)Sodium ions channels return to the resting state and repolarization continues.
2)Voltage-gated sodium ion channels activate,sodium ions enter,and the axon section depolarize
3)As potassium ion channels return to resting state,the axolemma may hyperpolarize before retur to the resting membrane potential.
4)A local potential depolarizes the axolemma of the trigger zone to threshold.
5)Sodium ion channels inactivate,and voltage-gated potassium ion channels activate,so sodium i stop entering and potassium ions leave,beginning repolarization.
A)2,4,5,1,3
B)4,2,5,1,3
C)4,2,3,5,1
D)4,2,1,3,5

Quizplus · Accepted Answer

The action potential begins with a local potential depolarizing the axolemma of the trigger zone to threshold (step 4). Then, voltage-gated sodium ion channels activate, sodium ions enter, and the axon section depolarizes (step 2). Next, sodium ion channels inactivate and voltage-gated potassium ion channels activate, which causes sodium to stop entering and potassium to leave, beginning repolarization (step 5). Sodium ion channels then return to the resting state and repolarization continues (step 1). Finally, as potassium ion channels return to the resting state, the axolemma may hyperpolarize before returning to the resting membrane potential (step 3).

Place These Steps of the Action Potential in the Correct