Which laboratory value is expected with Graves' disease?
Decreased calcium
Decreased T4
Increased thyroid stimulating hormone (TSH)
Increased T3
The Correct Answer is D
Choice A reason: Graves’ disease, a form of hyperthyroidism, does not typically cause decreased calcium. It may lead to hypercalcemia due to increased bone resorption from elevated thyroid hormone levels, which enhance osteoclast activity, making decreased calcium an incorrect laboratory finding for this condition.
Choice B reason: Graves’ disease is characterized by increased thyroid hormone production, including elevated T4 due to autoimmune stimulation of the thyroid. Decreased T4 is associated with hypothyroidism, not hyperthyroidism, making this choice incorrect as it contradicts the pathophysiology of Graves’ disease.
Choice C reason: Increased TSH is seen in primary hypothyroidism, where the thyroid is underactive. In Graves’ disease, TSH is typically decreased due to negative feedback from elevated thyroid hormones (T3 and T4), making this choice incorrect for the expected laboratory profile.
Choice D reason: Graves’ disease causes hyperthyroidism, with increased production of thyroid hormones, including T3, due to autoantibodies stimulating TSH receptors. Elevated T3 levels drive metabolic symptoms like weight loss and tachycardia, making this the correct laboratory finding for Graves’ disease.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: Photophobia, sensitivity to light, is not associated with hypothyroidism. It occurs in conditions like migraines or meningitis. Hypothyroidism slows metabolism, causing fatigue, not light sensitivity, making this choice incorrect.
Choice B reason: Exophthalmos, protruding eyes, is associated with hyperthyroidism (Graves’ disease) due to orbital inflammation. Hypothyroidism does not cause eye protrusion, making this choice incorrect for hypothyroidism manifestations.
Choice C reason: Weight loss is typical of hyperthyroidism due to increased metabolism. Hypothyroidism slows metabolism, causing weight gain, not loss, due to reduced energy expenditure, making this choice incorrect.
Choice D reason: Hypothyroidism reduces thyroid hormone levels, slowing metabolism and causing lethargy, fatigue, and reduced energy. This is a hallmark symptom due to decreased cellular activity, making this the correct choice.
Correct Answer is ["A","B","C"]
Explanation
Choice A reason: Hyperglycemia causes polyuria as high blood glucose exceeds renal reabsorption capacity, leading to osmotic diuresis. Excess glucose in urine draws water, increasing urine output, a classic diabetes symptom, making this a correct manifestation.
Choice B reason: Polyphagia, or increased hunger, occurs in hyperglycemia as cells cannot utilize glucose due to insulin deficiency or resistance, signaling energy deficit. The body craves food to compensate, making this a correct manifestation.
Choice C reason: Excessive thirst (polydipsia) results from hyperglycemia-induced polyuria, causing dehydration. The body signals thirst to replenish fluid loss from osmotic diuresis, a hallmark of diabetes, making this a correct manifestation.
Choice D reason: Photophobia, sensitivity to light, is not associated with hyperglycemia. It occurs in conditions like meningitis or migraines, not metabolic disturbances like diabetes, making this choice incorrect for hyperglycemia manifestations.
Choice E reason: Dysphagia, difficulty swallowing, is unrelated to hyperglycemia. It may occur in neurological or esophageal disorders, not as a direct result of high blood glucose, making this choice incorrect for hyperglycemia.
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