Gene mutations that occur after birth. Most gene mutations occur after you're born and aren't inherited. A number of forces can cause gene mutations, such as smoking, radiation, viruses, cancer-causing chemicals (carcinogens), obesity, hormones, chronic inflammation and a lack of exercise.
Answer:
Emphysema is the gradual destruction of the alveoli, while asthma is a sensitivity to irritants that causes the airway to constrict.
Explanation:
Both "emphysema" and "asthma" are conditions of the lungs. However, they differ in many things.
<em>Emphysema is the gradual destruction of the alveoli</em> caused by an<em> exposure to irritants in the air for a long period of time.</em> This condition starts with a <u>shortness of breath.</u> People may not know they have an emphysema until later in life.
Asthma is the constriction of the airways due to<em> irritants</em> and <em>allergens</em>. Allergens may include<em> pollen, pet dander, dust mites, cold air, etc. </em>A person with asthma has a<em> wheezing sound</em> in the lungs. This is more common in children.