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 C
Explanation
Choice a reason:
Getting a longer cord for the telephone may reduce the risk of tripping over a short cord but could potentially introduce new tripping hazards if not managed properly. It's important to keep cords secured and out of walkways to prevent falls.
Choice b reason:
Placing a throw rug over electrical cords is not advisable as it can create a tripping hazard. Rugs should be secured with non-slip backing and kept away from high-traffic areas to prevent falls.
Choice c reason:
Using handrails in the bathroom is a recommended safety measure to prevent falls. Bathrooms can be slippery, and handrails provide support and stability for residents when moving around in this area.
Choice d reason:
Using chairs without armrests is not a recommended practice for fall prevention. Chairs with armrests can aid residents in safely sitting down and standing up, providing support and reducing the risk of falls.
Correct Answer is D
Explanation
The correct answer is d) Stage II.
Choice a reason:
Stage IV pressure ulcers are the most severe, with full-thickness skin loss and exposed bone, tendon, or muscle. Signs of stage IV include large-scale tissue loss, possibly including slough or eschar, and may include undermining and tunneling. The scenario described does not indicate such an advanced stage, as there is no mention of exposed deeper tissues or structures.
Choice b reason:
Stage III pressure ulcers involve full-thickness skin loss, potentially affecting subcutaneous tissue but not extending to underlying muscle or bone. The wound may have a crater-like appearance. The described condition does not match stage III, as there is no indication of the ulcer extending into subcutaneous tissue.
Choice c reason:
Stage I pressure ulcers present with intact skin and non-blanchable redness of a localized area usually over a bony prominence. The skin may be painful, firm, soft, warmer, or cooler compared to adjacent tissue. In the given scenario, the skin is not intact, ruling out stage I.
Choice d reason:
Stage II pressure ulcers are characterized by partial-thickness loss of dermis presenting as a shallow open ulcer with a red-pink wound bed, without slough. They may also present as intact or ruptured blisters. The description of the skin condition with erythema, serosanguineous drainage, and a blister-like appearance aligns with a stage II pressure ulcer.
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