What happens anatomically in emphysema? أ) Growth of alveolar walls ب) Destruction of alveolar walls and air trapping ج) Increased blood flow؟
إجابة الطالب المختصرة من خلال موقع بوابة الإجابات هي
ب) Destruction of alveolar walls and air trapping
The correct answer is **ب) Destruction of alveolar walls and air trapping**.
Here's why:
* **Emphysema** is a chronic obstructive pulmonary disease (COPD) characterized by the permanent enlargement of the air spaces distal to the terminal bronchioles, accompanied by the destruction of their walls without obvious fibrosis. This destruction of alveolar walls leads to:
* **Loss of surface area for gas exchange:** With fewer alveolar walls, there's less area for oxygen to move into the blood and carbon dioxide to move out.
* **Air trapping:** The destroyed alveoli lose their elasticity, making it difficult to exhale fully. Air becomes trapped in the lungs, leading to hyperinflation.
* **A) Growth of alveolar walls** This is the opposite of what happens in emphysema.
* **C) Increased blood flow** Emphysema can eventually lead to pulmonary hypertension (increased blood pressure in the pulmonary arteries) due to damage and changes in the lung vasculature, but initially and primarily, the problem is the destruction of the alveoli, not an increase in blood flow. In advanced stages, there can be remodeling of blood vessels and increased blood flow, but that is secondary to the alveolar destruction.
Therefore, the defining anatomical feature of emphysema is the **destruction of alveolar walls and air trapping**.
اذا كان لديك إجابة افضل او هناك خطأ في الإجابة علي سؤال What happens anatomically in emphysema? أ) Growth of alveolar walls ب) Destruction of alveolar walls and air trapping ج) Increased blood flow اترك تعليق فورآ.
