ATI RN
Test Questions on Autonomic Nervous System MCAT Questions
Question 1 of 5
Concerning pain sensation:
Correct Answer: B
Rationale: Pain uses both myelinated (A-delta) and unmyelinated (C) fibers (not only myelinated, ruling out A). Perception occurs in the cortex (B, correct), referral is visceral to somatic (C is correct but less central), and cordotomy relief is temporary (not long-lasting, D). B is the most definitive.
Question 2 of 5
Lower motor neuron disease is characterized by:
Correct Answer: A
Rationale: Lower motor neuron disease causes wasting (A), weakness, and hyporeflexia, not hypertonia (B), hyperreflexia (C), or clonus (D, upper motor signs). A is correct.
Question 3 of 5
A 75 year old man gradually presented with left sided tremor especially at rest, and poverty of movement and a festinant gait. On clinical examination of this patient the following is true:
Correct Answer: B
Rationale: This describes Parkinson’s: rest tremor, bradykinesia, festinant gait, and mask-like face (B, correct). Rigidity (not hypotonia, A), normal power (not severely affected, C), and normal reflexes (not absent, D) are typical. B is correct.
Question 4 of 5
What region of the diencephalon coordinates homeostasis?
Correct Answer: C
Rationale: The hypothalamus (C) regulates homeostasis (e.g., temperature, hunger, thirst). The thalamus (A) relays sensory/motor signals, epithalamus (B) includes the pineal gland (circadian rhythms), and subthalamus (D) aids motor control. C is correct.
Question 5 of 5
Which portion of the ventricular system is found within the diencephalon?
Correct Answer: B
Rationale: The third ventricle (B) lies within the diencephalon, between the thalami. Lateral ventricles (A) are in the telencephalon, cerebral aqueduct (C) in the midbrain, and fourth ventricle (D) between pons and cerebellum. B is correct.