Respiratory System MCAT Practice Questions
14 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 · hard1. A 42-year-old man undergoes cardiac catheterization for evaluation of chest pain. During the procedure, simultaneous blood samples are obtained from the radial artery and the co…
- MCAT · medium2. A 24-year-old woman with type 1 diabetes mellitus presents to the emergency department with a 2-day history of polyuria, polydipsia, and progressive dyspnea. Vital signs show re…
- MCAT · medium3. A 58-year-old man with a 40 pack-year smoking history presents with progressive dyspnea and chronic cough. Pulmonary function tests show FEV1 of 45% predicted with an FEV1/FVC r…
- MCAT · medium4. A researcher studies oxygen transport in a patient with chronic hypoxia. Analysis reveals that hemoglobin's P50 value has decreased from the normal 26 mmHg to 18 mmHg. The patie…
- MCAT · medium5. A 58-year-old man with a 15-year history of poorly controlled type 2 diabetes mellitus presents for pulmonary function testing as part of a comprehensive diabetes complications…
- MCAT · medium6. A 28-year-old woman is admitted to the ICU with severe pneumonia complicated by acute respiratory distress syndrome (ARDS). Chest X-ray shows bilateral infiltrates, and she requ…
- MCAT · medium7. A 62-year-old man with a history of esophageal cancer undergoes esophagectomy with bilateral vagal nerve injury during the procedure. Postoperatively, he is extubated and breath…
- MCAT · medium8. A 45-year-old man presents with progressive hoarseness over 2 weeks. He denies dysphagia or dyspnea at rest. Physical examination reveals a left vocal cord in the paramedian pos…
- MCAT · medium9. A 34-year-old male with no significant medical history undergoes cardiopulmonary exercise testing. During peak exercise, his arterial blood gas shows pH 7.32, pCO₂ 48 mmHg, HCO₃…
- MCAT · medium10. A 62-year-old man with a 3-year history of idiopathic pulmonary fibrosis presents with progressive dyspnea on exertion. Pulmonary function testing shows a forced vital capacity…
- MCAT · medium11. A 68-year-old man with COPD presents to the pulmonary clinic for evaluation of dyspnea on exertion. Pulmonary function tests show significantly reduced FEV1 and FVC. During exer…
- MCAT · medium12. A 45-year-old man with chronic obstructive pulmonary disease presents with a 6-month history of progressive dyspnea. Arterial blood gas analysis shows PaO2 of 55 mmHg and PaCO2…
- MCAT · medium13. A 28-year-old healthy woman completes a maximal cardiopulmonary exercise test. During peak exercise, her oxygen consumption increases from a resting value of 250 mL/min to 2500…
- MCAT · medium14. A 68-year-old man with a 45-pack-year smoking history presents with progressive dyspnea on exertion, chronic cough, and weight loss over the past 2 years. Pulmonary function tes…