Question

In emphysema, there is:

• A. Fluid in alveoli
• B. Infection of lungs
• C. Destruction of alveolar walls
• D. Narrowing of bronchi

Hint:

Emphysema is considered an irreversible condition. While treatments can manage symptoms, the destroyed alveolar walls do not regenerate.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Emphysema is a chronic, long-term respiratory disorder that affects the structures responsible for gas exchange. It is classified under Chronic Obstructive Pulmonary Disease (COPD).

Step 2: Detailed Explanation:
In the condition known as emphysema:
1. The alveolar walls (the delicate walls of the air sacs) are damaged or destroyed over time.
2. This destruction results in larger, fewer air sacs instead of many tiny ones, which drastically reduces the total surface area available for the exchange of oxygen and carbon dioxide.
3. Furthermore, the elastic fibers of the lungs are damaged, leading to air trapping and difficulty in exhaling.
A major known cause of this condition is chronic cigarette smoking.

Step 3: Final Answer:
Emphysema is characterized by the structural destruction of alveolar walls.

Answer 2

Emphysema can be pinned down by comparing it against other respiratory conditions that are commonly confused with it, since each wrong option actually describes a different disease entirely.

1. Fluid in alveoli: This describes pulmonary oedema or pneumonia, where alveolar air spaces fill with liquid, not the dry, air-trapping damage seen in emphysema, so this belongs to a different condition.
2. Infection of lungs: This describes pneumonia or bronchitis caused by pathogens, whereas emphysema is a long-term structural disease usually driven by chronic irritant exposure such as cigarette smoke, not by an active infection.
3. Destruction of alveolar walls: This is the defining structural change in emphysema, where the thin walls separating individual alveoli break down, merging many small air sacs into fewer, larger, floppy ones. This destroys the fine mesh of capillary-rich surface needed for gas exchange and also damages the elastic fibers that normally help push air back out, causing the trapped-air breathlessness typical of the disease.
4. Narrowing of bronchi: This describes chronic bronchitis or asthma, where airway inflammation and mucus narrow the passages themselves, rather than destroying the alveolar sacs at the end of those passages.

Only the option describing breakdown of the alveolar walls actually matches the structural hallmark of emphysema, since the other three describe entirely separate lung conditions.

So the correct answer is Destruction of alveolar walls.