ATI RN
Autonomic Nervous System NCLEX Questions Questions
Question 1 of 5
Which of the following is not considered a type of synapse?
Correct Answer: D
Rationale: Dendrodendritic, axosomatic, and axoaxonic are synapse types. 'Denoaxonic' is likely a typo (perhaps 'deno-' for dendritic), not a recognized type.
Question 2 of 5
The chemical transmitter between sympathetic postganglionic fibers and the effector organs is:
Correct Answer: A
Rationale: Norepinephrine is the primary neurotransmitter released by sympathetic postganglionic fibers to effectors (e.g., smooth muscle). Acetylcholine is used at ganglia, adrenaline/epinephrine are adrenal medulla secretions.
Question 3 of 5
Which describes the effect of the sympathetic system on the eye pupil and the intestinal tract?
Correct Answer: A
Rationale: Sympathetic activation dilates pupils (via radial muscle) and inhibits intestinal motility (fight-or-flight). Parasympathetic constricts pupils and stimulates digestion.
Question 4 of 5
Autoreceptors of the sympathetic division that are involved in negative feedback are the:
Correct Answer: B
Rationale: α₂ autoreceptors on presynaptic terminals inhibit norepinephrine release (negative feedback). Other receptors (α₁, β₁, β₂) mediate effector responses.
Question 5 of 5
Which of the following is not a function of the ANS?
Correct Answer: D
Rationale: The ANS regulates involuntary visceral functions, not conscious motor control (somatic nervous system). Other options are ANS roles.