Physiology Vital capacity is decreased, timed vital capacity (FEV 1.0 %) is normal in: A Bronchial asthma B Scoliosis C Chronic bronchitis D Acute bronchitis 💡 Explanation Vital capacity is decreased, timed vital capacity (FEV 1.0 %) is normal in: ✓ Correct Answer: B. Scoliosis