ATI LPN
Neurology Exam Questions Questions
Question 1 of 5
Which of the following brain regions controls the secretion of pituitary hormones and exerts direct control over many other aspects of homeostasis?
Correct Answer: B
Rationale: The hypothalamus regulates pituitary hormone release and homeostasis (e.g., temperature, hunger).
Question 2 of 5
The Schwann cells form a myelin sheath around the:
Correct Answer: D
Rationale: Schwann cells wrap around axons in the PNS to form a myelin sheath, enhancing impulse conduction, not around dendrites, cell bodies, or nodes.
Question 3 of 5
Which of the following is the correct sequence in a typical reflex arc:
Correct Answer: B
Rationale: A reflex arc sequence is: receptor detects stimulus, afferent neuron to CNS (integration center), efferent neuron to effector.
Question 4 of 5
The nerve that contains sensory fibers that are involved in hearing is:
Correct Answer: D
Rationale: Cranial nerve VIII (vestibulocochlear) carries auditory sensory fibers for hearing.
Question 5 of 5
One type of bipolar cells contains a special receptor, mGluR6, which is sign reversing (the cell hyperpolarizes when glutamate binds to this receptor). When the drug APB is applied to the retina, the response of the neurons containing this receptor is blocked. Which of the following results would you expect from the application of APB to the retina?
Correct Answer: D
Rationale: mGluR6 is on ON-bipolar cells; APB (an agonist) blocks their response, making ON-center ganglion cells unresponsive to light onset, mimicking OFF-center cells.