Anatomy and Physiology Quiz
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SYSTEMS & INTEGRATION
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A 45-year-old patient presents to the emergency department with the following vital signs and laboratory results: Blood pressure 88/52 mmHg, heart rate 118 bpm, respiratory rate 24 breaths/min, temperature 98.2°F, urine output 15 mL/hr for the past 4 hours, serum sodium 148 mEq/L (normal 135-145), blood urea nitrogen (BUN) 45 mg/dL (normal 7-20), and hematocrit 52% (normal 37-47% for women, 40-50% for men). Which physiological mechanism is most likely being activated to compensate for this patient's condition?
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