Neuron and Neurotransmitter

Neuron and Neurotransmitter

Professional Development

6 Qs

quiz-placeholder

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Neuron and Neurotransmitter

Neuron and Neurotransmitter

Assessment

Quiz

Science

Professional Development

Practice Problem

Hard

Created by

Sham Tajidin

Used 1+ times

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6 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which part of the neuron is primarily responsible for integrating incoming synaptic signals and initiating an action potential if the threshold is reached?

Dendrites

Axon hillock

Axon terminal

Nodes of Ranvier

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which ion is most responsible for the depolarization phase of a neuronal action potential?

Potassium (K⁺)

Calcium (Ca²⁺)

Sodium (Na⁺)

Magnesium (Mg²⁺)

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best describes the role of the myelin sheath in neuronal transmission?

It facilitates neurotransmitter release at synapses

It increases the capacitance of the axonal membrane

It allows for saltatory conduction, speeding up action potential propagation

It increases resistance across the membrane, slowing signal propagation

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which neurotransmitter is primarily inhibitory in the adult central nervous system and acts by increasing chloride ion influx?

Glutamate

Acetylcholine

Dopamine

GABA

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best explains how neurotransmitters are removed from the synaptic cleft to terminate the signal?

Only by enzymatic degradation

Only by diffusion out of the cleft

By active transport into glial cells only

By a combination of enzymatic degradation, diffusion, and reuptake into the presynaptic neuron

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

During the repolarization phase of an action potential, which of the following events occurs?

Voltage-gated sodium channels open

Potassium ions exit the neuron

Calcium ions enter the neuron

Sodium-potassium pump inactivates