1) 1. In diseases like emphysema, alveolar walls break down. What is the main consequence for gas exchange? a) A. Increased blood flow b) C. Reduced surface area c) B. Decreased diffusion distance d) D. Improved oxygen uptake 2) 2. How does regular aerobic exercise improve gas exchange efficiency?  a) A. By increasing lung capacity and capillary networks b) B. By damaging alveolar walls c) C. By increasing airway resistanceFILTRATION d) D. By decreasing breathing rate permanently 3) 3. What is one effect of obesity on gas exchange efficiency? a) Increased oxygen transport b) Improved diaphragm movement c) Increased alveolar surface area d) Reduced lung expansion due to fat accumulation 4) 4. What term describes lung tissues scar and thicken due to lifestyle factors? a) Pulmonary fibrosis b) Sickle cell anaemia c) Asthma d) Emphysema

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