Understanding Action Potentials

Understanding Action Potentials

10th - 12th Grade

10 Qs

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Understanding Action Potentials

Understanding Action Potentials

Assessment

Interactive Video

Science

10th - 12th Grade

Practice Problem

Easy

NGSS
HS-PS3-5

Standards-aligned

Created by

S. McMillan

Used 7+ times

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What initiates an action potential in a neuron?

The movement of potassium ions out of the cell

The release of neurotransmitters binding to receptors

The closing of voltage-gated sodium channels

The hyperpolarization phase

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the resting membrane potential of a neuron?

-55 millivolts

-70 millivolts

+30 millivolts

0 millivolts

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What role do neurotransmitters play in generating an action potential?

They close potassium channels

They open sodium-potassium pumps

They bind to receptors, allowing sodium ions to enter the neuron

They hyperpolarize the neuron

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which ions primarily move into the neuron during depolarization?

Chloride

Magnesium

Potassium

Sodium

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

At what voltage do voltage-gated sodium channels open?

0 millivolts

-55 millivolts

-70 millivolts

+30 millivolts

Tags

NGSS.HS-PS3-5

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the significance of the -55 millivolts threshold in neurons?

It indicates the neuron is in the repolarization phase

It signals the neuron to hyperpolarize

It triggers the opening of voltage-gated sodium channels

It is the resting membrane potential

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens when the neuron's interior reaches +30 millivolts?

Sodium channels close and potassium channels open

Potassium channels close

Sodium channels open further

Neuron immediately returns to resting potential

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