ATI RN
Nervous System Multiple Choice Questions and Answers Questions
Question 1 of 5
Clostridium botulinum releases this enzyme that destroys peptide bonds.
Correct Answer: B
Rationale: Clostridium botulinum produces botulinum toxin, an endopeptidase that cleaves SNARE proteins, inhibiting neurotransmitter release. Amylase digests starch, exopeptidases cleave ends, protein kinase phosphorylates.
Question 2 of 5
Nurse Jerick is performing a caloric testing of the vestibulo-ocular reflex of an unconscious client. Warm water is poured into the left auditory canal. The client exhibits conjugate eye movement toward the right followed by nystagmus toward the left. The nurse understands that the client is exhibiting a:
Correct Answer: C
Rationale: Warm water in the left ear causes eye movement to the right and nystagmus to the left in an intact brainstem (normal vestibulo-ocular reflex). Abnormal responses suggest lesions or coma.
Question 3 of 5
The autonomic nervous system is responsible for which function(s)?
Correct Answer: A
Rationale: The ANS controls involuntary motor functions (e.g., heart rate, digestion). Sensory functions are handled by the somatic nervous system or visceral afferents, not primarily ANS.
Question 4 of 5
Of the following statements about the parasympathetic division of the ANS: (i) all its neurons release acetylcholine as their primary neurotransmitter substance; (ii) the cell bodies of its postganglionic neurons lie in or near the organ innervated; (iii) the cell bodies of its preganglionic neurons lie in the cervical and sacral spinal cord; one would say that:
Correct Answer: C
Rationale: (i) True: Parasympathetic uses acetylcholine. (ii) True: Postganglionic neurons are near organs. (iii) False: Preganglionic neurons are in brainstem (cranial nerves) and sacral cord, not cervical.
Question 5 of 5
Cholinergic-blocking agents have as an unwanted side effect:
Correct Answer: D
Rationale: Cholinergic blockers (e.g., atropine) inhibit parasympathetic effects, causing dry mouth (reduced salivation). Other options are parasympathetic effects.