A nurse is performing a neurologic assessment on the client and notes a positive Romberg test. This test for balance is related to which of the following cranial nerves?
VII.
VI.
VIII.
IX.
The Correct Answer is C
Choice A rationale
Cranial nerve VII (Facial nerve) controls muscles of facial expression and functions in taste sensations from the anterior two-thirds of the tongue, not balance.
Choice B rationale
Cranial nerve VI (Abducens nerve) controls lateral eye movement and has no role in balance or proprioception.
Choice C rationale
Cranial nerve VIII (Vestibulocochlear nerve) is responsible for hearing and balance. A positive Romberg test indicates issues with proprioception or vestibular function, which is directly linked to this nerve.
Choice D rationale
Cranial nerve IX (Glossopharyngeal nerve) involves taste sensation from the posterior third of the tongue and some swallowing functions, not balance.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Roth's spots are retinal hemorrhages with pale centers, indicative of certain systemic conditions, but do not relate to pupil response or parasympathetic effects.
Choice B rationale
One pupil being dilated while the other is normal could indicate a variety of issues, but not specifically a parasympathetic effect. This condition is known as anisocoria.
Choice C rationale
Dilated pupils, or mydriasis, are usually the result of sympathetic stimulation, not a parasympathetic effect, which involves constriction of the pupils.
Choice D rationale
Constricted pupils, or miosis, are a parasympathetic effect typically resulting from increased activity of the parasympathetic nervous system, which reduces pupil size.
Correct Answer is B
Explanation
Choice A rationale
Lamellae are layers of bone tissue arranged in concentric circles in compact bone, not cells responsible for bone matrix secretion.
Choice B rationale
Osteoblasts are the cells responsible for the secretion of bone matrix. They produce collagen and other substances necessary for bone formation and growth.
Choice C rationale
Osteocytes are mature bone cells derived from osteoblasts. They maintain bone tissue but do not secrete bone matrix.
Choice D rationale
Osteoclasts are cells involved in the resorption of bone tissue, not the secretion of bone matrix. They break down bone tissue during growth and repair.
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