Which cranial nerve is responsible for the sense of smell?
V – Trigeminal.
II – Optic.
I – Olfactory.
VIII – Vestibulocochlear.
The Correct Answer is C
Choice A reason: The trigeminal nerve (V) controls facial sensation and chewing, not smell, which is governed by the olfactory nerve (I). Misidentifying this risks incorrect neurological assessment, potentially missing olfactory deficits indicating brain injury or tumors, critical for accurate diagnosis and management in patients with sensory complaints.
Choice B reason: The optic nerve (II) governs vision, not smell, which is the olfactory nerve’s function (I). Assuming optic involvement misguides cranial nerve assessment, risking oversight of olfactory dysfunction, which may signal neurological conditions like Parkinson’s or trauma, requiring targeted evaluation and intervention in clinical practice.
Choice C reason: The olfactory nerve (I) is responsible for the sense of smell, transmitting sensory input from the nasal mucosa to the brain. Accurate identification ensures proper neurological assessment, detecting deficits that may indicate trauma, tumors, or neurodegenerative diseases, guiding diagnosis and treatment in patients with smell-related complaints.
Choice D reason: The vestibulocochlear nerve (VIII) controls hearing and balance, not smell, which is the olfactory nerve’s role (I). Misidentifying this risks incorrect assessment, potentially overlooking olfactory issues signaling neurological pathology, delaying diagnosis and management critical for addressing sensory deficits in clinical neurological evaluations.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: Full range of motion against gravity only corresponds to a 3/5 muscle strength rating, indicating the muscle can move the joint against gravity but not additional resistance. This is weaker than 4/5, which includes some resistance, making this choice incorrect for the described strength level.
Choice B reason: Visible muscle contraction without joint movement indicates a 1/5 rating, reflecting minimal strength, often seen in severe neurological or muscular disorders. This is far below a 4/5 rating, which requires full range of motion and resistance, making this choice irrelevant to the question.
Choice C reason: A 4/5 muscle strength rating indicates full range of motion against gravity with some resistance, but not maximal. This reflects good muscle function, slightly below normal, often due to minor injury or fatigue. It aligns with standard muscle strength scales, making it the correct choice.
Choice D reason: Full range of motion against gravity with full resistance corresponds to a 5/5 rating, indicating normal muscle strength. This is stronger than 4/5, which involves only some resistance, reflecting a slight deficit. This choice does not match the described strength level.
Correct Answer is B
Explanation
Choice A reason: The left lower quadrant contains the sigmoid colon and parts of the small intestine, not the liver. Liver assessment involves palpation and percussion in the right upper quadrant, where it resides, making this choice incorrect for locating the liver anatomically.
Choice B reason: The liver is located in the right upper quadrant, beneath the diaphragm, extending slightly into the left upper quadrant. It is assessed via percussion and palpation in the RUQ to evaluate size or tenderness, making this the correct choice for liver localization.
Choice C reason: The left upper quadrant houses the stomach, spleen, and parts of the pancreas, not the liver’s primary location. While the liver’s left lobe extends slightly into the LUQ, its main mass is in the RUQ, making this choice incorrect.
Choice D reason: The right lower quadrant contains the appendix and cecum, not the liver. Liver assessment targets the right upper quadrant, where its bulk resides, making this choice incorrect for identifying the liver’s anatomical position during physical examination.
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