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Exploring the Neuron and Neural Firing Mechanisms

Question 1

Multiple choice
What structure in the neuron primarily receives signals from other neurons?

  • Cell body

  • Axon

  • Myelin sheath

  • Dendrites

Question 2

Multiple choice
Which of the following best describes the function of the myelin sheath?

  • It generates action potentials.

  • It increases the speed of neural impulses along the axon.

  • It releases neurotransmitters into the synapse.

  • It serves as the metabolic center of the neuron.

Question 3

Multiple choice
What is the term for the electrical charge difference across the neuronal membrane when the neuron is not actively firing?

  • Resting potential

  • Equilibrium potential

  • Action potential

  • Threshold potential

Question 4

Multiple choice
During an action potential, the rapid influx of which ion into the neuron causes depolarization?

  • Chloride (Cl-)

  • Sodium (Na+)

  • Potassium (K+)

  • Calcium (Ca2+)

Question 5

Multiple choice
What is the term for the space between the axon terminal of one neuron and the dendrites of another neuron?

  • Glial gap

  • Synaptic cleft

  • Axon hillock

  • Neural network

Question 6

Multiple choice
What happens during the refractory period of a neuron?

  • The neuron's membrane potential is restored to the resting potential.

  • Neurotransmitters are released into the synapse.

  • The neuron cannot fire another action potential.

  • The neuron is more likely to fire an action potential.

Question 7

Multiple choice
Which of the following neurotransmitters is commonly associated with the pleasure and reward pathway of the brain?

  • GABA

  • Serotonin

  • Acetylcholine

  • Dopamine

Question 8

Multiple choice
What is the process called when the membrane potential becomes more negative than the resting potential?

  • Repolarization

  • Hyperpolarization

  • Thresholding

  • Depolarization

Question 9

Multiple choice
What is the name of the process by which neurotransmitters are released from the axon terminal into the synaptic cleft?

  • Diffusion

  • Osmosis

  • Endocytosis

  • Exocytosis

Question 10

Multiple choice
Which glial cells are responsible for producing the myelin sheath in the peripheral nervous system?

  • Oligodendrocytes

  • Schwann cells

  • Microglia

  • Astrocytes

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