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Which of these statements is/are correct relating to the aetiology and pathogenesis of emphysema?Question 42Answera.Excessive protease activity will typically increase destruction of the alveolar walls.b.A strong inflammatory response and increased neutrophil activity can lead to reduced alveolar damage.c.Cigarette smoking leads to emphysema by inducing metaplasia in the bronchioles.d.Emphysema is most commonly a consequence of pneumonia.e.Bacterial infection, excess mucus production and mucus gland hyperplasia are key factors.

Question

Which of these statements is/are correct relating to the aetiology and pathogenesis of emphysema?Question 42Answera.Excessive protease activity will typically increase destruction of the alveolar walls.b.A strong inflammatory response and increased neutrophil activity can lead to reduced alveolar damage.c.Cigarette smoking leads to emphysema by inducing metaplasia in the bronchioles.d.Emphysema is most commonly a consequence of pneumonia.e.Bacterial infection, excess mucus production and mucus gland hyperplasia are key factors.

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Solution

The correct statements relating to the aetiology and pathogenesis of emphysema are:

a. Excessive protease activity will typically increase destruction of the alveolar walls. This is true because proteases are enzymes that break down proteins. In the case of emphysema, an overproduction of proteases can lead to the destruction of the alveolar walls, which are made up of proteins.

c. Cigarette smoking leads to emphysema by inducing metaplasia in the bronchioles. This is also true. Cigarette smoke contains many harmful substances that can damage the cells in the lungs. This damage can cause the cells to change, or undergo metaplasia, which can lead to emphysema.

The other statements are incorrect:

b. A strong inflammatory response and increased neutrophil activity can lead to reduced alveolar damage. This is incorrect. In fact, a strong inflammatory response and increased neutrophil activity can actually lead to increased alveolar damage, not reduced.

d. Emphysema is most commonly a consequence of pneumonia. This is incorrect. While pneumonia can potentially lead to emphysema, it is not the most common cause. The most common cause of emphysema is long-term exposure to irritants, such as tobacco smoke.

e. Bacterial infection, excess mucus production and mucus gland hyperplasia are key factors. This is incorrect. While these factors can contribute to the development of emphysema, they are not considered key factors. The key factors in the development of emphysema are long-term exposure to lung irritants, especially tobacco smoke, and a deficiency in the protein alpha-1-antitrypsin.

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