Neural transmission: Action potentials

Question 1

Action potential

Answer 1

Electrical impulse which conducts information along an axon, occurs when there is a change in the membrane potential.

Question 2

Membrane Potential

Answer 2

Total amount of energy stored within a neuron-charge of the cell membrane

Question 3

Resting potential

Answer 3

Charge difference across the membrane whilst a neuron is at rest, usually -70mV

Question 4

Outside of a neuron charge

Answer 4

Positively charged

Question 5

Inside of a neuron charge

Answer 5

Negatively charged

Question 6

What needs to happen for an action potential to occur

Answer 6

Threshold of excitation must be reached (-60mV)

Question 7

Threshold of excitation

Answer 7

Charge a neuron must reach for an action potential to occur (-60mV)

Question 8

Depolarisation

Answer 8

When an action potential occurs the charge of the membrane potential increases and becomes positively charged (40mV)

Question 9

Repolarisation

Answer 9

Membrane potential reduces to negative charge