Neural Communication

What is it called when positively charged particles are outside of the neuron and negatively charged particles are inside the neuron?

• resting potential

• action potential

• refractory period

• depolarization

What is a brief electrical charge that travels down the axon of the neuron?

• resting potential

• action potential

• refractory period

• polarization

During the action potential, ______ charged particles enter the axon.

• negative

• neutral

• positive

• strongly

What is the level of stimulation required to trigger a neural impulse/ action potential?

• threshold

• refractory period

• sodium particles

• potassium particles

Depolarization is

• the mixing of positive and negative charges within the axon

• the separation of positive and negative charges

• refractory period

• polarization

What is a brief resting pause that occurs after a neuron has fired?

• resting potential

• action potential

• refractory period

• depolarization

The sodium-potassium pump is the mechanism by which ions (charged particles) are allowed to pass through the membrane of the cell.

• True

• False

The threshold for an action potential is:

• 100 millivolts

• 0 millivolts

• -55 millivolts

• -100 millivolts

What happens when the action potential/ neural impulse reaches the end of the axon?

• neurotransmitters are released into the synapse

• the process begins again

• potassium enters the axon

• sodium enters the axon

A neurotransmitter's reabsorption by the sending neuron is called:

• reuptake

• depolarization

• polarization

• refractory period