Action Potential Comp Check

During depolarization...

• K+ channels open

• Na+ channels open

• Na+/K+ pump sodium out and potassium in

During repolarization...

• K+ channels open

• Na+ channels open

• Na+/K+ pump sodium out and potassium in

If depolarization reaches -55 mV, an action potential will be generated. What is this -55 mV trigger point called?

• Action Potential

• Threshold

• Refractory Period

After an action potential, the membrane becomes more negative than -70 mV. This period is called:

• Action Potential

• Threshold

• Refractory Period

As the axon hillock depolarizes, Voltage-gated Na+ channels open and Na+ moves (into or out of) _​ (a)   ____​ ___ the cell causing further (depolarization or repolarization) ___​ (b)   _____.​ ​

• into
• out of
• depolarization
• repolarization

State the name of each part of the action potential graph:

e

f

g

h

d

Refractory Period

Action Potential

Hyper Potential

Hyperfixation

Repolarization

Resting potential

Reflection Point

Depolarization