Why is decreased compliance a concern in respiratory health?

• A. It makes breathing easier
• B. It can lead to respiratory failure
• C. It reduces physiological dead space
• D. It enhances lung capacity

Answer: (B)

Decreased compliance in the lungs refers to a reduced ability of the lung tissue to expand during inhalation. When compliance is decreased, the lungs become stiffer, making it more difficult for air to flow in. This impaired expansion can lead to inadequate ventilation, where not enough air reaches the alveoli for proper gas exchange. As a result, oxygen levels in the blood may drop and carbon dioxide levels may rise, leading to respiratory failure.

The other choices do not accurately describe the implications of decreased compliance. While decreased compliance does not make breathing easier—in fact, it does the opposite—there is also no enhancement of lung capacity or reduction of physiological dead space associated with this condition. Understanding the relationship between lung compliance and overall respiratory function is critical, as decreased compliance can significantly impact a person's ability to breathe and maintain adequate oxygenation.