NEET PG DENTAL EXAM

Detailed explanation-1: -Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs. Upon exhalation, the diaphragm relaxes and returns to its domelike shape, and air is forced out of the lungs.

Detailed explanation-2: -Inspiration (inhalation) is the process of taking air into the lungs. It is the active phase of ventilation because it is the result of muscle contraction. During inspiration, the diaphragm contracts and the thoracic cavity increases in volume. This decreases the intraalveolar pressure so that air flows into the lungs.

Detailed explanation-3: -Diaphragm is a large muscular dome-shaped structure that helps during respiration. Diaphragm contracts during inspiration creating more volume for the lungs to expand and take in more air.

Detailed explanation-4: -Solution : The volume of the thoracic cavity increases when the diaphragm contracts and flattens.