A nurse is preparing to assess a patient's sensory function. Which cranial nerve should be tested for smell?
Olfactory nerve (CNI)
Facial nerve (CN VII)
Optic nerve (CN II)
Trigeminal nerve (CNV)
The Correct Answer is A
A. Olfactory nerve (CN I): The Olfactory nerve is a pure sensory nerve responsible for the sense of smell. It is tested by asking the patient to identify common scents (like coffee or mint) with their eyes closed.
B. Facial nerve (CN VII): The Facial nerve controls facial expressions and provides taste sensation to the anterior two-thirds of the tongue, but it is not involved in smell.
C. Optic nerve (CN II): The Optic nerve transmits visual information from the eyes to the brain.
D. Trigeminal nerve (CN V): The Trigeminal nerve is responsible for facial sensation (touch/pain) and motor functions like chewing. It can sense the "sting" of ammonia (a pain response), but not actual odors.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","E"]
Explanation
A. Parathyroid hormone (PTH):PTH is the principal hormone that raises blood calcium. It increases bone resorption (releasing Ca²⁺), enhances renal calcium reabsorption, and stimulates activation of vitamin D (calcitriol) in the kidney, which increases intestinal calcium absorption.
B. Thyroxine:Thyroxine (T4) regulates metabolic rate and growth. It does not play a primary role in acute regulation of serum calcium, although chronic thyroid disease can influence bone turnover indirectly.
C. Cortisol:Cortisol (a glucocorticoid) can affect bone metabolism and calcium balance with long-term excess (promotes bone resorption and can reduce calcium absorption), but it is nota primary hormone for short-term physiologic regulation of serum calcium.
D. Insulin:Insulin primarily regulates glucose uptake and metabolism; it does not directly regulate serum calcium levels.
E. Calcitonin:Secreted by the thyroid C cells, calcitonin lowers blood calcium by inhibiting osteoclast activity and decreasing bone resorption. Its role in humans is less critical than PTH for everyday calcium homeostasis, but it is a classical calcium-lowering hormone.
F. Glucagon:Glucagon primarily raises blood glucose by stimulating glycogenolysis and gluconeogenesis. It does not have a primary role in calcium regulation.
Correct Answer is D
Explanation
A. Frontal plane:The frontal plane (also called the coronal plane) divides the body into anterior (front) and posterior (back) portions. It does not separate right and left halves.
B. Coronal plane:The coronal plane is synonymous with the frontal plane and divides the body into front and back. Therefore it is not the plane that separates right and left.
C. Transverse plane:The transverse (horizontal) plane divides the body into superior (upper) and inferior (lower) parts. It does not create right and left halves.
D. Sagittal plane:The sagittal plane divides the body into right and left portions. A midsagittal (median) plane produces equal right and left halves; a parasagittal plane produces unequal right and left portions.
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