Question

multiple choice question
the force that moves air into the lungs is ______ pressure.
o atmospheric
o hydraulic
o blood
o electrostatic

Explanation:

When we breathe in, the diaphragm and intercostal muscles contract, increasing the volume of the thoracic cavity. This causes a decrease in pressure inside the lungs (intrapulmonary pressure) compared to the atmospheric pressure. As a result, air moves from an area of higher pressure (atmosphere) to an area of lower pressure (lungs) due to the pressure gradient. Hydraulic pressure involves fluids in pipes or confined spaces and is not related to lung - air movement. Blood pressure is related to the circulation of blood in the cardiovascular system. Electrostatic pressure is related to electric charges and has no role in the movement of air into the lungs.

Answer:

Atmospheric pressure.