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Breathing occurs because of air pressure differences between the lungs and the?
Atmosphere
What the thing that cause inhalation?
As your diaphragm or intercoastal muscles contract the size of the lungs increases. This creates a pressure difference between your lungs and the surrounding atmosphere. By increasing the size of the lungs you create a low pressure environment in the lungs by expanding the same amount of gas to a larger area. this pressure difference doesn't have to be much 1mmhg is more then enough, the main thing is just that you need a difference in preasure. Air flows from high preasure to low preasure, so by decreasing the preasure in the lungs air flows into the lungs. as you breath out you make the lungs smaller by relaxing the muscles and diaphragm, making the volume in the lungs decrease, thus increasing the preasure and moving the air from inside the lungs out to the surrounding atmosphere.
What occurs when the air pressure in the lungs is higher than in the atmosphere?
When the air pressure in the lungs is higher than in the atmosphere, air will flow out of the lungs to equalize the pressure. This is called exhalation. It allows the body to get rid of carbon dioxide and regulate oxygen levels.
When you inhale does pressure decrease inside or increase?
The act of inhaling is to create low pressure in the lungs, causing the air in the atmosphere to rush in as it is moving from a higher pressure (outside in the atmosphere) to the lower pressure (created in the lungs). However the fact that air does move into the lungs means that there is no net change in pressure.
Under what condition does air flow goes in to the lungs?
when pressure inside the lungs is lower then outer atmosphere
Which explains the relationship between the gas pressure gradient of the atmosphere and the alveolar air that allows inhalation?
Sub atmospheric pressure in the lungs is generated through sudden expansion caused by the diaphragm and accessory muscles; this sudden and brief pressure gradient is recognized by airflow from the atmosphere into the lungs until they are filled. Once the lungs are filled and achieve a greater than atmospheric pressure another pressure gradient is established and with the assistance of elastic recoil allow exhalation to occur. This end of exhalation provides a temporary period of equilibrium between the lung and outside atmosphere where no air flow occurs. The lungs never totally deflate. The remaining volume left in the lungs after passive exhalation is referred to as the Functional Residual Capacity or FRC. A person can forcefully exhale a portion of their FRC but cannot eliminate all of it; a remaining portion referred to as the residual volume remains. A combination of factors involving surface tension of the alveoli and 0 pressure gradient prevent the elimination of RV.
How is intrapleural pressure maintained?
Intrapleural pressure is maintained by the opposing forces of the elastic recoil of the lung and chest wall. During inspiration, the diaphragm contracts and the intercostal muscles expand the thoracic cage, causing a decrease in intrapleural pressure. This negative pressure helps keep the lungs inflated.
What is the pressure difference between the external air and the pleural cavity when inhalation just begins?
The pressure in the pleural cavity becomes more negative compared to the external air during inhalation, which creates a pressure difference. This pressure gradient allows air to flow into the lungs, expanding them for inhalation.
What is the difference between Intrapulmonary and Intrapleural?
Intrapulmonary refers to inside the lungs, specifically within the lung tissue itself. Intrapleural refers to within the pleural cavity, the space between the membranes surrounding the lungs.
What determines in which direction carbon dioxide and oxygen will diffuse in the lungs?
pressure difference between carbon dioxide and oxygen level between pulmonary artery and alveolar space
Why does air rush into the lungs during the process of breathing?
Air enters the lungs because the pressure in the atmosphere is greater than the pressure in the lungs. Lung pressure is lowered by increasing the volume of the lungs. This is achieved by lowering the diaphragm and raising the rib cage.
What is the pressure difference between the external air and pleural cavity when inhalation just begins?
At the start of inhalation, the pressure in the pleural cavity is normally about 756 mmHg, while the external air pressure is about 760 mmHg. This creates a pressure difference of 4 mmHg, causing air to flow into the lungs.
