What cranial nerve is responsible for the taste sensation of the posterior third of the tongue?
Facial
Abducens
Glossopharyngeal
Hypoglossal
The Correct Answer is C
Choice A Reason:
The facial nerve, or cranial nerve VII, is responsible for the taste sensation in the anterior two-thirds of the tongue, not the posterior third. It carries taste sensations from the front part of the tongue via the chorda tympani branch.
Choice B Reason:
The abducens nerve, or cranial nerve VI, has no role in taste sensation. It is primarily involved in controlling the lateral rectus muscle of the eye, which abducts the eye.
Choice C Reason:
The glossopharyngeal nerve, or cranial nerve IX, provides special sensory innervation for taste to the posterior third of the tongue. This enables the sensation of various tastes like salty, sweet, sour, and bitter in this region.
Choice D Reason:
The hypoglossal nerve, or cranial nerve XII, is responsible for motor control of the tongue muscles but does not provide sensory innervation for taste.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice a reason:
Pigeon Chest, or pectus carinatum, is a condition where the breastbone is pushed outward, and the chest appears to protrude. It is not typically associated with a barrel-shaped chest, which is characterized by a rounded and bulging appearance.
Choice b reason:
Pneumonia is an infection that inflames the air sacs in one or both lungs, which may fill with fluid or pus. While it can cause chest expansion, it does not lead to a barrel-shaped chest. The barrel-shaped chest is more indicative of a chronic condition rather than an acute infection like pneumonia.
Choice c reason:
Funnel Chest, or pectus excavatum, is a condition where the breastbone is sunken into the chest. Unlike a barrel-shaped chest, funnel chest gives the chest a depressed appearance.
Choice d reason:
COPD, or Chronic Obstructive Pulmonary Disease, is commonly associated with a barrel-shaped chest. This shape results from the chronic hyperinflation of the lungs due to obstructive lung disease, which causes the rib cage to remain expanded.
Correct Answer is A
Explanation
Choice A Reason:
Vertigo is a common complication associated with inner ear infections, such as labyrinthitis or vestibular neuritis. The inner ear is responsible for balance, and when it is infected, it can lead to a sensation of spinning or dizziness. Interventions may include medications like meclizine or dimenhydrinate to alleviate symptoms, as well as safety measures to prevent falls.
Choice B Reason:
Rhinorrhea, or a runny nose, is not typically a direct complication of an inner ear infection. It may be associated with upper respiratory infections that can precede or accompany an ear infection but is not a result of the inner ear infection itself.
Choice C Reason:
Fever may be present if the inner ear infection is part of a systemic infection, such as the flu or bacterial meningitis. However, fever is not a direct result of an isolated inner ear infection. If fever is present, the nurse should monitor the patient's temperature and may administer antipyretics as ordered.
Choice D Reason:
Headache can be a symptom experienced by individuals with inner ear infections due to the general discomfort and pressure changes in the ear. However, it is not as specific or as common as vertigo when it comes to inner ear infections. If headaches are present, pain management strategies can be included in the care plan.
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