The disorder in which walls of the alveoli gets damaged , resulting in a decrease in the surface area, is called :

Options

A. Asthma
B. Allergy
C. Emphysema
D. Pneumonia

Answer

To solve the question regarding the disorder in which the walls of the alveoli get damaged, resulting in a decrease in surface area, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a specific disorder that damages the alveoli, leading to a reduction in their surface area. Alveoli are tiny air sacs in the lungs where gas exchange occurs.

2. **Analyzing the Options**:
- **Asthma**: This condition involves the narrowing of airways and trapping of air in the alveoli but does not primarily damage the alveolar walls or decrease their surface area.
- **Allergy**: Allergies typically affect the upper respiratory tract and bronchioles, not the alveoli directly, so this option is also incorrect.
- **Emphysema**: This is a respiratory disorder characterized by the destruction of the alveolar walls, leading to a significant decrease in surface area for gas exchange. This option fits the description given in the question.
- **Pneumonia**: In pneumonia, the alveoli fill with fluid or pus, which can swell them but does not primarily damage the walls or decrease the surface area.

3. **Identifying the Correct Answer**: Based on the analysis, emphysema is the disorder that specifically involves damage to the alveoli and a decrease in surface area, making it the correct answer.

### Conclusion:
The disorder in which the walls of the alveoli get damaged, resulting in a decrease in surface area, is called **Emphysema**.

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