ATI RN
Test Questions on Autonomic Nervous System Questions
Question 1 of 5
Which of the following would not result from sympathetic stimulation?
Correct Answer: D
Rationale: Sympathetic stimulation promotes glycogenolysis, spleen contraction, and adrenal catecholamine release (fight-or-flight), but reduces salivary secretion (dry mouth). Profuse salivation is parasympathetic.
Question 2 of 5
Atropine (which blocks muscarinic receptors) is liable to cause:
Correct Answer: B
Rationale: Atropine blocks parasympathetic muscarinic receptors, reducing vagal tone and increasing heart rate. Salivation and intestinal activity decrease, cardiac strength is unaffected.
Question 3 of 5
Which pairing of nerve and organ innervated is incorrect?
Correct Answer: D
Rationale: Abducens (VI) innervates the lateral rectus eye muscle, not facial muscles (facial nerve, VII). Other pairings are correct.
Question 4 of 5
The basic unit of the nervous system is the:
Correct Answer: C
Rationale: The neuron is the fundamental structural and functional unit of the nervous system, encompassing axons, dendrites, and cell body. Synapses are junctions between neurons.
Question 5 of 5
The transmitter substance in the presynaptic neuron is contained in the:
Correct Answer: B
Rationale: Neurotransmitters (e.g., acetylcholine) are stored in synaptic vesicles (neuron vesicles) in the presynaptic terminal, released into the cleft upon signal.