Question

Explain the damage caused by the changes in the bronchi & bronchioles with chronic asthma.

Answer 1

• The airways include trachea, bronchi and brochioles , which is surrounded by smooth muscle.
• Airways are lined by mucus membrane , which secrete mucus or fluid which washes out the bacteria from the airway that might get into the lungs.overreaction or hyper-responsiveness leads to bronchospasm, which is excessive contraction of bronchial smooth muscle.
• The airway also become inflammed and swelling of the bronchial mucous membrane and secretion of excessive thick mucus that is difficult to expel.
• Obstruction of airway leads to decreased air flow, which is felt as tightness in the chest and labored breathing which is called dyspnea.
• Obstruction and inflammation cause coughing.Due to increased mucus ,there will be increased cough as body always attempt to expel the mucus.
• Narrowing of airway causes noises when air is passed through them with sufficient speed, which is typically high pitched voice called wheezing.
• Mucus in the airway also cause a rough rattling sound called coarse crackle.