Home › CBSE Class 11 (Science) › Biology › Breathing and Exchange of Gases › What is a major cause of emphysema?
What is a major cause of emphysema?
ACigarette smoking
BCold weather
CPollen exposure
DDust from grinding
Answer & Solution
Correct answer: A. Cigarette smoking
Smoking cigarettes is one of the chief causes of alveolar wall damage in emphysema.
Related questions
Why is heart failure also called congestive heart failure?Repeated readings of what level or higher indicate hypertension?What is the normal blood pressure reading in a healthy adult?Why is the human heart described as myogenic?What supplies blood to the cardiac muscle itself?Which layer is comparatively thin in veins?Which vessel layer is lined by squamous endothelium?Which layer of an artery wall has smooth muscle and elastic fibres?