Question: what is the pressure in the lungs after expiration

title: Exhalation
text: Asthma , COPD , and smokers have reduced airflow ability . People who suffer from asthma and COPD show decreases in exhaled air due to inflammation of the airways . This inflammation causes narrowing of the airways which allows less air to be exhaled . Numerous things cause inflammation some examples are cigarette smoke and environmental interactions such as allergies , weather , and exercise . In smokers the inability to exhale fully is due to the loss of elasticity in the lungs . Smoke in the lungs causes them to harden and become less elastic , which prevents the lungs from expanding or shrinking as they normally would .