Question

With paradoxical chest movement, there can be the movement of air from one lung to another. This is called:

A) Lung oscillation.
B) Paradoxical ventilation.
C) Air shuffling.
D) Breathing synchronization.

Answer 1

Pulmonary ventilation refers to the process of air entering and leaving the lungs. During inspiration, the diaphragm and external intercostal muscles contract, expanding the thoracic cavity and allowing air to be drawn into the lungs. During expiration, the diaphragm and intercostal muscles relax, causing the air pressure within the lungs to increase and air to be forced out.

Step-by-step explanation:

Pulmonary ventilation consists of the process of inspiration (or inhalation), where air enters the lungs, and expiration (or exhalation), where air leaves the lungs. During inspiration, the diaphragm and external intercostal muscles contract, causing the rib cage to expand and move outward, and expanding the thoracic cavity and lung volume. This creates a lower pressure within the lung than that of the atmosphere, causing air to be drawn into the lungs. During expiration, the diaphragm and intercostals relax, causing the thorax and lungs to recoil. The air pressure within the lungs increases to above the pressure of the atmosphere, causing air to be forced out of the lungs. However, during forced exhalation, the internal intercostals and abdominal muscles may be involved in forcing air out of the lungs.