Exploring the Neuron and Neural Firing Mechanisms
Question 1
What structure in the neuron primarily receives signals from other neurons?
Cell body
Axon
Myelin sheath
Dendrites
Question 2
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
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
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
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
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
Which of the following neurotransmitters is commonly associated with the pleasure and reward pathway of the brain?
GABA
Serotonin
Acetylcholine
Dopamine
Question 8
What is the process called when the membrane potential becomes more negative than the resting potential?
Repolarization
Hyperpolarization
Thresholding
Depolarization
Question 9
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
Which glial cells are responsible for producing the myelin sheath in the peripheral nervous system?
Oligodendrocytes
Schwann cells
Microglia
Astrocytes
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