Question

Air, like other gases, flows from a region with higher pressure to a region with lower pressure. Muscular breathing movements and recoil of elastic tissues create the changes in pressure that result in the breathing process.

Which of the following can be inferred from this paragraph?

Answer 1

Breathing involves the movement of air from an area of higher pressure to an area of lower pressure. This is achieved through the contraction and relaxation of muscles, such as the diaphragm and intercostal muscles. When we inhale, the decrease in air pressure in the lungs allows air to be drawn in, while exhaling involves an increase in air pressure that pushes air out of the lungs.

Step-by-step explanation:

Breathing involves the movement of air from an area of higher pressure to an area of lower pressure. This movement is facilitated by changes in pressure created by muscular breathing movements and the recoil of elastic tissues. When we inhale, the diaphragm and intercostal muscles contract, causing an increase in chest volume and a decrease in air pressure in the lungs. This lower pressure allows air to be drawn into the lungs. On the other hand, when we exhale, the diaphragm and intercostal muscles relax, causing a decrease in chest volume and an increase in air pressure in the lungs. This higher pressure pushes the air out of the lungs.

This action decreases the pressure inside the lungs relative to the atmospheric pressure, causing air to flow into the lungs. During expiration, the diaphragm relaxes and the intercostal muscles allow the rib cage to retract, which increases the pressure inside the lungs, forcing air out due to the principle that gases move from a region of higher pressure to a region of lower pressure.