A 28-year-old medical student reports progressive fatigue, i…
A 28-year-old medical student reports progressive fatigue, intense thirst, and increased urination over the past month. During exam week, he experiences episodes of rapid heartbeat, difficulty focusing, and unintentional weight loss despite eating normally. His labs show: Blood glucose: markedly elevated Insulin: low Cortisol: elevated ADH levels: normal Urine-specific gravity: low Serum sodium: slightly elevated Blood pressure: slightly low Heart rate: elevated The physician explains that at least three body systems are interacting to create his symptoms. Which explanation best integrates these findings? A. Elevated cortisol reduces ADH release, causing water retention and hypertension, which explains the patient’s thirst and low urine output.B. Low insulin and high cortisol increase blood glucose, leading to osmotic diuresis; fluid loss decreases plasma volume, activating cardiovascular compensation, which explains tachycardia.C. Elevated cortisol increases insulin secretion and decreases urinary output, causing hypotension and hyponatremia.D. Low insulin directly stimulates the kidneys to retain sodium and water, raising blood pressure and reducing heart rate.