ATI RN
Nervous System Questions Questions
Question 1 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 2 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.
Question 3 of 5
Abnormal fluid accumulation in the lungs would be detected during breathing by
Correct Answer: B
Rationale: Auscultation (listening with a stethoscope) detects abnormal lung sounds (e.g., crackles) from fluid accumulation. Percussion assesses density, inspection is visual, and palpation is touch.
Question 4 of 5
In the brain, this surrounds the white matter.
Correct Answer: C
Rationale: Gray matter (neuronal cell bodies, dendrites) surrounds white matter (axons) in the brain’s cortex. Ganglia are PNS, and dendrites are neuron parts.
Question 5 of 5
Motor neurons from the hypoglossal (XII) nerve innervate the tongue. Destruction of these motor neurons due to traumatic injury would result in the loss of a(n)
Correct Answer: A
Rationale: Hypoglossal (CN XII) motor neurons innervate tongue muscles (effectors). Their destruction impairs tongue movement, not sensory, integration, or CNS pathways.