ATI RN
Nervous System Questions Questions
Question 1 of 5
The functional junction between two neurons or between a neuron and an effector, such as a muscle or gland; may be electrical or chemical.
Correct Answer: C
Rationale: A synapse is the junction where neurons communicate with neurons or effectors, via chemical or electrical signals. Effectors are targets, effector cell is vague, and neurotransmitter is a synapse component.
Question 2 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 3 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 4 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 5 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.