Anatomy-action potentials quizizz

The sodium potassium pump restores the resting potential. By which process does this work?

Active transport

In resting potential, neurons have more _________ on the outside of the cell membrane.

Na+

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

6

The sodium-potassium pump....

Exchanges (K+) & (Na+) during hyperpolarization

An action potential is __________ in nature, with the inside of the neuron being more ________.

electrical, negative

Which ions are involved in an action potential?

Na; K

When a membrane potential reaches +30mV, ________ channels open, ________ occurs, and ________ channels close.

postassium, repolarization, sodium

At which point on the diagram does depolarisation of the axon occur?

B

A membrane potential becoming less negative is called

depolarization

When a neuron is not engaged in an impulse.

Resting potential

When is the potassium channel open?

during repolarization only

Why is -55 mV a significant number?

This is the threshold required to complete an action potential

As the neuron fires, there's a reversal in _____ as the axon undergoes ________.

charge, depolarization

What number on the graph represents the Hyperpolarization phase?

4

Action potentials run along the ______ from ______ to ________.

axon, dendrites, axon terminals

At what stage are both ions present in large concentrations INSIDE the neuron?

Depolarizarion

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

-70mV