Emphysema is a condition in which `:-`

Options

A. Repiratory centre inhibited
B. Lot of fluid in the lungs
C. The walls seperating the alveoli break
D. Lungs have more `O_(2)`

Answer

**Step-by-Step Solution:**

1. **Understanding Emphysema**: Emphysema is a chronic respiratory condition that primarily affects the lungs. It is characterized by damage to the alveoli, which are the tiny air sacs in the lungs where gas exchange occurs.

2. **Causes of Emphysema**: One of the most common causes of emphysema is cigarette smoking. Other factors can include long-term exposure to air pollution, chemical fumes, and dust.

3. **Impact on Alveoli**: In emphysema, the walls of the alveoli become inflamed and eventually break down. This leads to the formation of larger air spaces instead of many small ones.

4. **Consequences of Alveolar Damage**: The breaking down of the walls between the alveoli reduces the overall surface area available for gas exchange. This means that less oxygen can be absorbed into the bloodstream and less carbon dioxide can be expelled.

5. **Identifying the Correct Option**: Given the options:
- A) Respiratory center inhibited
- B) A lot of fluid in the lungs
- C) The walls separating the alveoli break
- D) Lungs have more oxygen

The correct answer is C) The walls separating the alveoli break, as this accurately describes the pathological changes occurring in emphysema.

**Final Answer**: Emphysema is a condition in which the walls separating the alveoli break.

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