ATI RN
Test Questions on Autonomic Nervous System MCAT Questions
Question 1 of 5
The primary visual cortex, involved in visual perception, is located in the:
Correct Answer: D
Rationale: The primary visual cortex (V1) in the occipital lobe processes vision.
Question 2 of 5
Ventral roots of spinal nerves consist of:
Correct Answer: B
Rationale: Ventral roots carry motor (efferent) fibers only.
Question 3 of 5
Myasthenia gravis is due to receptors being blocked and destroyed by antibodies.
Correct Answer: C
Rationale: Myasthenia gravis involves antibodies blocking/destroying nicotinic acetylcholine receptors at neuromuscular junctions. Epinephrine is a neurotransmitter, 'transient' is unclear.
Question 4 of 5
Valium has an effect on ___ to inhibit neural transmission.
Correct Answer: C
Rationale: Valium (a benzodiazepine) enhances GABA’s inhibitory effect by increasing Cl- channel opening, reducing neural activity.
Question 5 of 5
Supporting cells located within the CNS are collectively called:
Correct Answer: A
Rationale: Neuroglia (glial cells) support CNS neurons (e.g., astrocytes, oligodendrocytes). Astrocytes are a subtype, perikaryon is the cell body, satellite cells are PNS.