Question

your patient has normal airflow out of the lungs, yet a below normal value for vital capacity. which of the below listed may be the underlying cause? multiple choice smoking asthma degenerative muscle disease bronchitis

Explanation:

Vital capacity is the maximum amount of air a person can expel from the lungs after a maximum inhalation. Smoking, asthma, and bronchitis typically affect airflow (obstructive lung diseases), causing reduced airflow. Degenerative muscle disease (like muscular dystrophy affecting respiratory muscles) can limit the ability to fully expand and contract the lungs, reducing vital capacity while airflow (if airways are unobstructed) can remain normal.

Answer:

degenerative muscle disease