ATI LPN
Neurology Exam Questions Questions
Question 1 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 2 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 3 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.
Question 4 of 5
The concept of the receptive field depends on the fact that:
Correct Answer: D
Rationale: Receptive fields define how neurons respond to specific retinal stimuli with membrane potential changes, forming the basis of visual processing.
Question 5 of 5
Fill in the blanks: in the vestibular system, otolith organs detect and semicircular canals are sensitive to
Correct Answer: D
Rationale: Otolith organs detect linear acceleration/gravity; semicircular canals detect angular head rotations.