Final answer:
Difficulty breathing and poor air exchange are signs of asthma.
Step-by-step explanation:
Difficulty breathing and poor air exchange can be signs of a respiratory condition called asthma Asthma is a chronic inflammatory disease of the airways, characterized by periodic narrowing and swelling of the airways, excessive mucus production, and difficulty expelling air from the lungs. Symptoms of asthma include coughing, wheezing, shortness of breath, and chest tightness.