Question

Obstructive lung diseases like bronchitis and asthma are most likely to reduce which of the following?

1) Lung capacity
2) Oxygen levels in the blood
3) Airway resistance
4) Cough reflex

Answer 1

Obstructive lung diseases like bronchitis and asthma are most likely to reduce lung capacity and oxygen levels in the blood due to increased airway resistance and obstruction. The correct option is 1.

Step-by-step explanation:

Obstructive lung diseases like bronchitis and asthma most likely reduce lung capacity and oxygen levels in the blood. These diseases are characterized by an increase in resistance within the airways, meaning that the airways become obstructed.

This can lead to air becoming trapped in the lungs after exhalation, leading to an overexpansion of the lung (increased lung volume) and difficulty in breathing.

Obstructive lung diseases do not specifically reduce the cough reflex; rather, they often lead to an increased cough reflex as the body attempts to clear the obstruction. Similarly, airway resistance is not reduced; it is increased in these conditions.