Which of the following hormones is secreted by the thyroid gland?
Renin
Brain natriuretic peptide (BNP)
Erythropoietin
Calcitonin
The Correct Answer is D
Choice A reason: Renin, from the kidneys, regulates blood pressure via angiotensin, not a thyroid product, unrelated to its metabolic or calcium functions.
Choice B reason: BNP, secreted by the heart, reduces volume overload in heart failure, not a thyroid hormone, distinct from its endocrine role.
Choice C reason: Erythropoietin, from kidneys, stimulates red blood cell production, not produced by the thyroid, which focuses on metabolism and calcium.
Choice D reason: Calcitonin, from thyroid parafollicular cells, lowers blood calcium by inhibiting bone resorption, a key thyroid hormone alongside T3/T4.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: Radioactive iodine treats hyperthyroidism by destroying thyroid tissue, reducing hormone production. It’s contraindicated in hypothyroidism, where hormone replacement is needed instead.
Choice B reason: Sumatriptan, a serotonin agonist, treats migraines by constricting blood vessels. It has no role in hypothyroidism, which requires thyroid hormone supplementation.
Choice C reason: Levothyroxine replaces deficient thyroid hormone in hypothyroidism, normalizing metabolism by mimicking T4, addressing symptoms like fatigue and weight gain effectively.
Choice D reason: Levofloxacin, an antibiotic, fights bacterial infections but doesn’t address hypothyroidism’s hormonal deficiency, making it irrelevant to this condition’s treatment.
Correct Answer is A
Explanation
Choice A reason: Albuterol, a bronchodilator, rapidly opens airways in COPD, relieving acute shortness of breath and improving oxygenation from 85% by relaxing bronchial smooth muscle.
Choice B reason: Mucolytics thin mucus over time, not addressing acute dyspnea or low saturation (85%) quickly, lacking the immediacy needed in this scenario.
Choice C reason: Montelukast prevents asthma inflammation long-term via leukotriene blockade, not providing rapid relief for COPD’s acute bronchospasm or hypoxia here.
Choice D reason: Prednisone reduces COPD inflammation systemically, but its slow onset doesn’t acutely reverse shortness of breath or oxygen drop like a bronchodilator.
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