What cranial nerve is responsible for the taste sensation of the posterior third of the tongue?

Facial

Abducens

Glossopharyngeal

Hypoglossal

Answer and Explanation

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.

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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.

A. Conjunctiva B. Sclera of the eye C. Back of the neck D. Palms of the hands

Correct Answer is B

Explanation

Choice A Reason:
The conjunctiva can sometimes appear yellow in individuals with jaundice; however, it is not the most reliable area to inspect for jaundice. The conjunctiva may be affected by other factors such as environmental irritants or infections, which can alter its appearance.

Choice B Reason:
The sclera of the eye is the most reliable area to inspect for jaundice. The yellowing of the sclera, also known as scleral icterus, is a key indicator of jaundice. The sclera's white background provides a clear contrast, making any yellow discoloration more noticeable. This is particularly true in darker-skinned individuals, where skin changes may be less apparent.

Choice C Reason:
The back of the neck is not a reliable area to inspect for jaundice. Skin pigmentation and lighting can affect the visibility of yellowing, making it an unreliable indicator. Additionally, the back of the neck may have other skin changes unrelated to jaundice that could confuse the assessment.

Choice D Reason:
The palms of the hands are not the most reliable area to inspect for jaundice. While the palms may show yellowing, they are subject to various external factors such as manual labor or exposure to substances that can affect their color. Moreover, the palms' skin may be thicker and less transparent, making subtle changes in color more difficult to detect.

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What cranial nerve is responsible for the taste sensation of the posterior third of the tongue?

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Naxlex Comprehensive Predictor Exams

When planning care for a client with an inner ear infection, the nurse will need to include interventions for which of the following potential problems?

Correct Answer is A

Explanation

A nurse is assessing a 64-year-old African-American client who has jaundice. The patient has a past medical history of alcoholism and liver cirrhosis. Which of the following areas is the most reliable for the nurse to inspect for jaundice?

Correct Answer is B

Explanation

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