ATI RN
Nervous System Questions Questions
Question 1 of 5
A cluster of neuronal cell bodies in the peripheral nervous system, such as the dorsal root ganglion.
Correct Answer: A
Rationale: A ganglion is a PNS cluster of neuronal cell bodies, e.g., dorsal root ganglion. Action potentials are signals, synaptic cleft is a gap, and neuropathy is a disorder.
Question 2 of 5
The brain and spinal cord.
Correct Answer: A
Rationale: The central nervous system (CNS) comprises the brain and spinal cord. White matter is axons, interneurons are neurons, and gray matter is cell bodies.
Question 3 of 5
Ability to respond to certain stimuli by producing electrical signals.
Correct Answer: D
Rationale: Electrical excitability is the ability of neurons/muscles to generate electrical signals (action potentials) in response to stimuli. Satellite cells are glia, spinal nerves are structures, and tract is CNS axons.
Question 4 of 5
The narrow gap at a chemical synapse that separates the axon terminal of one neuron from another neuron or muscle fiber and across which a neurotransmitter diffuses to affect the postsynaptic cell.
Correct Answer: B
Rationale: The synaptic cleft is the gap at a chemical synapse where neurotransmitters diffuse to the postsynaptic cell. Ganglion is a cell body cluster, neurotransmitter is a chemical, and synaptic vesicles store it.
Question 5 of 5
A channel that opens in response to physical distortion of the membrane.
Correct Answer: D
Rationale: A mechanically gated channel opens due to physical stimuli (e.g., pressure, stretch), as in touch receptors. Voltage-gated respond to voltage, ligand-gated to neurotransmitters, and leak channels are always open.