Neurons Action Potential Stages

Question 1

What stage of an action potential is described when the neuron is not communicating?

Answer 1

The resting stage

Question 2

When the neuron is resting where are the positive sodium ions?

Answer 2

Outside the neuron

Question 3

Why are positive ions trying to get into the neuron?

Answer 3

Because there are negatively charged proteins inside the neuron and opposites attract

Question 4

What goes back and forth inside and outside the neuron?

Answer 4

Potassium k+

Question 5

What mV is the resting stage?

Answer 5

-70mV

Question 6

What is the natural polarization of the neuron?

Answer 6

-70mV

Question 7

Why does the polarization change in the neuron?

Answer 7

Potassium K+ goes back and forth.

Question 8

What is the first stage of and action potential? That sparks the electrical activity to occur

Answer 8

The threshold stage

Question 9

What is the estimated mV charge in the threshold stage?

Answer 9

~40mV

Question 10

What stage has sodium outside, potassium more inside than outside and mV charge is ~40mV

Answer 10

Threshold

Question 11

Second stage of action potential?

Answer 11

Depolarization

Question 12

When the regular polarization of a neuron is negative, changing the polarization to positive charge is what stage of the action potential?

Answer 12

Depolarization+mV

Question 13

What is the only stage of an action potential where there is a positive +mV charge?

Answer 13

Depolarization

Question 14

The neuron does not like to be depolarized so when it tries to restore it’s negative polarization what stage is this in the action potential?

Answer 14

Repolarization

Question 15

How does the neuron restore its polarization?

Answer 15

By closing sodium ion channels and trapping sodium inside. Potassium starts to leave. Potassium out helps restore negative polarization.
Repolarization

Question 16

When both sodium and potassium flow into the neuron, creating a huge flow of positive polarization, what stage of the action potential is this?

Answer 16

Depolarization

Question 17

What stage happens after the repolarization stage has done too good of a job creating a negative polarized to communicate?

Answer 17

Hyperpolarization

Question 18

What stage has too many sodium in and too many potassium inside of a neuron? Flipped polarization paused communication

Answer 18

Hyperpolarization

Question 19

When the neuron is too negatively polarized which stage helps the neuron restart the action potential?

Answer 19

Sodium Na+/potassium k+ pump

Question 20

What stage is the sodium/potassium pump?

Answer 20

The 5th stage

Question 21

What stage is is the threshold stage of an action potential?

Answer 21

The 1st stage

Question 22

What stage is the depolarization of an action potential?

Answer 22

The 2nd stage

Question 23

What stage is the repolarization of an action potential?

Answer 23

The 3rd stage

Question 24

What stage is the hyperpolarization of an action potential?

Answer 24

The 4th stage

Question 25

What happens before and after action potentials?

Answer 25

The resting stage