ATI RN
Nervous System Questions Questions
Question 1 of 5
The sympathetic system does not:
Correct Answer: C
Rationale: Sympathetic system originates thoracolumbar (T1-L2), mobilizes energy, and dilates bronchi, but bile secretion is primarily parasympathetic (digestion-related).
Question 2 of 5
A cranial nerve that affects eye movement is the:
Correct Answer: C
Rationale: The trochlear nerve (IV) innervates the superior oblique muscle for eye movement. Optic is sensory, trigeminal is facial, hypoglossal is tongue.
Question 3 of 5
The rectus eye muscle capable of causing the eyeball to turn laterally in a horizontal plane is innervated by which cranial nerve?
Correct Answer: B
Rationale: The lateral rectus, innervated by the abducens nerve (VI), moves the eye laterally. Oculomotor (III) and trochlear (IV) move other muscles.
Question 4 of 5
A transmitter substance released into the synaptic cleft is:
Correct Answer: B
Rationale: Acetylcholine is a key neurotransmitter released into the synaptic cleft. Cholinesterase degrades it, ATP may co-release, RNA is not a transmitter.
Question 5 of 5
The presence of myelin gives a nerve fiber its:
Correct Answer: B
Rationale: Myelin, a lipid-rich sheath, gives axons a white appearance and speeds impulse transmission via saltatory conduction. Gray matter lacks myelin, regeneration is PNS-specific (Schwann cells).