What is NOT a characteristic of restrictive lung diseases?

Restrictive lung diseases are characterized primarily by a reduction in lung volumes and an inability to fully inflate the lungs. When considering the specifics of restrictive lung diseases, it's crucial to understand that they involve a decrease in the total volume of air that can be inhaled, which aligns with the inability to fully inflate the lungs and the observation of reduced lung volume.

The aspect of decreased lung compliance also corresponds with restrictive conditions. Compliance refers to the ability of the lung to expand; in restrictive lung disease, lung tissue is often stiffer, meaning compliance is diminished. This directly contributes to the reduced volume of air that can be inhaled during breathing.

In contrast, the characteristic of blocked airflow is typically associated with obstructive lung diseases rather than restrictive ones. Obstructive diseases, such as asthma or chronic obstructive pulmonary disease (COPD), involve narrowing of the airways that impede airflow, particularly during expiration. Thus, the presence of airflow obstruction is not a feature of restrictive lung conditions, making it the correct choice in this context.