Action Potential Flashcard

Front

Which ions are involved in an action potential? Options: Na; Cl, Na; K, K; Cl, Na; Ca

Back

Na; K

Front

What is the normal resting potential of a neuron cell membrane?

Back

-70mV

Front

Which is the correct order of events in depolarisation then repolarisation? Sodium channels close, potassium channels open, Sodium channels open, potassium channels open, Sodium channels open, potassium channels close, Potassium channels open, sodium channels open

Back

Sodium channels open, potassium channels open.

Front

At which point on the diagram does depolarisation of the axon occur? Options: A, B, C, D

Back

B

Front

What is the insulating membrane that surrounds parts of the axon that helps to speed up action potential?

Back

Myelin Sheath

Front

When a neuron is resting, the inside of the axon has a ____________ charge.

Back

negative

Front

A membrane potential becoming less negative is called

Back

depolarization

Front

In resting potential, neurons have more ____________ on the inside of the cell membrane.

Back

K+

Front

What number(s) on the graph represents the THRESHOLD level of stimulus?

Back

6

Front

An electrical impulse within a single neuron is called a

Back

action potential