Endocrine System MCAT Practice Questions
11 board-style MCAT questions in Biological & Biochemical Foundations (B/B). Each question shows the correct answer; create a free account for the full explanation and adaptive practice.
- MCAT · medium1. A clinical trial evaluates a novel GnRH antagonist administered to treat prostate cancer in men. GnRH antagonists rapidly block GnRH receptors on gonadotroph cells. Patients rec…
- MCAT · medium2. A 34-year-old man with no significant medical history undergoes routine fasting labs. His fasting glucose is 95 mg/dL and fasting insulin is 8 mIU/L. Two hours after consuming a…
- MCAT · medium3. A 34-year-old woman presents with a 6-week history of palpitations, heat intolerance, and unintentional weight loss of 8 pounds despite increased appetite. She reports tremor an…
- MCAT · medium4. A 54-year-old woman presents with a 6-month history of severe hot flashes occurring 8-10 times daily, night sweats that soak through her bedclothes, and irritable mood. Vital si…
- MCAT · medium5. A patient with primary hyperaldosteronism (aldosterone-secreting adrenal adenoma) shows elevated plasma aldosterone, suppressed plasma renin activity, and hypertension. When the…
- MCAT · medium6. A researcher observes that chronic stress increases cortisol levels, which subsequently inhibits thyroid hormone secretion and immune cell proliferation. When cortisol is remove…
- MCAT · medium7. A 55-year-old woman presents with a 3-month history of fatigue, weight gain, cold intolerance, and constipation. Vital signs are unremarkable. Laboratory studies reveal TSH 8.5…
- MCAT · medium8. A patient with a pituitary adenoma shows elevated prolactin levels (180 ng/mL, normal <25 ng/mL) and reports amenorrhea. When dopamine agonist bromocriptine is administered, pro…
- MCAT · medium9. During fasting, a healthy individual experiences decreased blood glucose but maintains stable neural function. Biochemical analysis shows elevated glucagon and decreased insulin…
- MCAT · medium10. A research team investigating thyroid regulation administers propranolol to a hyperthyroid patient. Within hours, the patient reports significant symptomatic improvement in trem…
- MCAT · medium11. A 45-year-old woman with a 10-year history of hypertension and obesity (BMI 34 kg/m²) presents to clinic with a 6-month history of increased thirst, frequent urination, and fati…