Neurons and Nerve Impulses Quiz

What is the state of the plasma membrane at rest?

• Depolarized

• Polarized

• Neutral

• Hyperpolarized

Where are there fewer positive ions in relation to the cell membrane?

• Outside the cell membrane

• Inside the cell membrane

• Equally distributed

• In the extracellular space

Which of the following can excite a neuron?

• Light

• Gravity

• Magnetism

• Temperature

Which of the following is NOT a stimulus that excites a neuron?

• Sound Waves

• Pressure

• Chemicals

• Magnetism

What role do neurotransmitters play in neuron excitation?

• They inhibit neuron activity.

• They excite neurons.

• They have no effect on neurons.

• They destroy neurons.

What happens to the neuron membrane when a stimulus is applied?

• The permeability of the neuron membrane remains unchanged.

• The permeability of the neuron membrane temporarily changes.

• The neuron membrane becomes permanently impermeable.

• The neuron membrane dissolves.

Tags

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What ion is allowed to flow into the neuron when the membrane is depolarized?

• Potassium (K+)

• Calcium (Ca2+)

• Sodium (Na+)

• Chloride (Cl-)

What is the result of the exchange of ions during depolarization?

• The membrane polarity is strengthened.

• The membrane polarity is completely reversed.

• The membrane polarity remains the same.

• The membrane polarity is weakened slightly.

What happens when the stimulus is strong enough and the influx of sodium ions is great enough?

• The neuron remains at resting state.

• The neuron undergoes hyperpolarization.

• A nerve impulse or action potential is activated.

• The neuron becomes permanently inactive.

Tags

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What happens if a stimulus is strong enough in the context of an all-or-none response?

• An action potential is generated.

• A partial impulse is generated.

• The impulse is conducted partially.

• The impulse is not conducted at all.