Summary Action Potential

Question 1

Upswing of action potential

Answer 1

• depolarization
• charge from -65 to +40mv
• (sodium gates opened)
• Na+ moves inside

Question 2

Downswing of action potential

Answer 2

• Repolarization
• Charge from +40 mV back to -65 mV
• K+ moved outside
• (potassium gates opened)

Question 3

Resting potential:

Answer 3

• charge is -65
• NA+ outside
• K+ inside

Question 4

Recovery phase:

Answer 4

• charge is -65 mV
• sodium/potassium pump
• moves NA+ out and K+ inside

Question 5

After the recovery phase the neuron…

Answer 5

Can be re-stimulated causing the wave motion down the neuron