True or False: Negative pressure is used to move air into the lungs.

Negative pressure is indeed used to move air into the lungs during the process of inhalation. When the diaphragm contracts and expands the thoracic cavity, the volume of the chest increases, which leads to a decrease in pressure within the lungs compared to the external atmospheric pressure. This difference in pressure creates a vacuum-like effect, allowing air to flow into the lungs.

In essence, the mechanism of breathing relies on changes in pressure; when the internal lung pressure falls below atmospheric pressure, air from outside flows in to equalize that pressure. This principle of negative pressure is fundamental to respiratory physiology and explains how the lungs draw in air, facilitating the exchange of gases necessary for respiration.