Which of the following does NOT happen when the diaphragm contracts?
A)The volume of the thoracic cavity increases.
B)Lung volume increases as the lungs are forced to expand.
C) The intra-alveolar pressure increases.
D) The intrathoracic pressure decreases.

Question

Quizplus · Accepted Answer

When the diaphragm contracts, it moves downwards, causing the volume of the thoracic cavity to increase. This creates a negative pressure within the thoracic cavity, causing the lungs to expand and fill with air. As a result, intrathoracic pressure decreases. However, intra-alveolar pressure remains relatively constant during inspiration.

Which of the Following Does NOT Happen When the Diaphragm