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Neuronal Potentials and Action Potentials Quiz

Neuronal Potentials and Action Potentials Quiz

Assessment

Interactive Video

Biology

10th - 12th Grade

Practice Problem

Hard

Created by

Jennifer Brown

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary role of the sodium-potassium pump in maintaining the resting potential of a neuron?

To depolarize the neuron

To open voltage-gated channels

To transfer three sodium ions out and two potassium ions in

To allow free flow of ions across the membrane

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which type of synaptic potential makes it more likely for a neuron to fire an action potential?

Excitatory postsynaptic potential (EPSP)

Resting potential

Graded potential

Inhibitory postsynaptic potential (IPSP)

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

At what membrane potential does an action potential typically begin?

-70 millivolts

0 millivolts

-55 millivolts

+30 millivolts

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

During which phase of an action potential do voltage-gated sodium channels close and potassium channels open?

Resting potential

Hyperpolarization

Depolarization

Repolarization

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What prevents an action potential from traveling backward along an axon?

The size of the axon

The refractory period

The presence of myelin sheaths

The sodium-potassium pump

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the function of myelin sheaths in neurons?

To generate action potentials

To release neurotransmitters

To insulate the axon and speed up transmission

To slow down action potential propagation

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Where do action potentials occur in myelinated neurons?

At the axon terminal

At the nodes of Ranvier

Only at the axon hillock

Along the entire axon

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