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When intrapulmonary pressure increases over atmospheric pressure does air flows out of the lungs?
Yes, when intrapulmonary pressure increases above atmospheric pressure, air flows out of the lungs. This occurs during the process of expiration, where the diaphragm and intercostal muscles relax, decreasing the volume of the thoracic cavity. As the volume decreases, the pressure inside the lungs rises, causing air to be expelled until the pressures equalize.
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What is the result of inspiration and expiration?
This occurs within the respiratory system. During inpiration, the intercostal muscles contract, the diaphragm descends, and the rib cage rises. The thoracic cavity volume increases, stretching the lungs, and the intrapulmonary volume increases. This causes the intrapulmonary pressure to drop. Air flows into the lungs until the intrapulmonary pressure equals the atmospheric pressure. During expiration the intercostal muscles relax, the diaphragm rises, and the rib cage descends. The thoracic cavity volume decreases, causing the the lungs to recoil, and the intrapulmonary volume decreases. This causes the intrapulmonary pressure to rise, and the air flows out of the lungs until the intrapulmonary pressure equals the atmospheric pressure.
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 effect on velocity and pressure if a liquid flows in a convergent pipe?
I think velocity is directly proportionate to its applying pressure.
As water is incompressible then how the pressure increases during hydro testing?
This is due to the static and dynamic pressure acting on the water.As water flows down Kinetic energy is translated to pressure energy and hence pressure increases during hydrotesting...
What happens during the inhalation phase of breathing?
Inhalation is the process of taking air into the lungs. For this to occur, the air pressure inside the lungs must be lower than that of the external atmosphere as air flows from areas of higher pressure to lower pressure. This is achieved by the contraction of the external intercostal muscles and the relaxation of the internal intercostals which acts to pull the ribcage upwards and outwards, hence, increasing the volume of the thoracic cavity. The diaphragm also contracts to extend the cavity further downwards. Due to the function of the pleural membrane, the size of the lungs is increased which, in turn, creates an area of lower air pressure inside the lungs; hence, air is drawn into the lungs. Exhalation is the process of expelling air out of the lungs. For this to occur, the air pressure inside the lungs must be higher than that of the external atmosphere as air flows from areas of higher pressure to ones of lower pressure. This is achieved by the relaxation of the external intercostal muscles which bring the rib cage inwards and the diaphragm bulges upwards (recoiling to its original shape) respectively. The internal intercostal muscles contract so as to pull the rib cage further inwards, hence, decreasing the volume of the thoracic cavity and that of the lungs which, in turn, creates high pressure in the lungs; hence air is pushed out of lungs. In passive breathing, the movements of the diaphragm are responsible - the ribs aren't needed.
What happens to carbon dioxide in the blood when it flows through the capillaries in the alveoli?
The CO2 is diffused back into the alveoli, where, by the diaphragm, is pushed back into the environment by atmospheric pressure.
What happens to the carbon dioxide in blood when it flows through the capillaries in the alveoli?
The CO2 is diffused back into the alveoli, where, by the diaphragm, is pushed back into the environment by atmospheric pressure.
What principle is involved for fluid that go through smaller opening?
The principle involved is known as Bernoulli's principle. This states that as the velocity of a fluid increases, its pressure decreases. Therefore, when fluid flows through a smaller opening, its velocity increases, resulting in a decrease in pressure.
What happens to entropy when pressure decreases?
When pressure decreases, entropy increases. Increases in entropy correspond to pressure decreases and other irreversible changes in a system. Entropy determines that thermal energy always flows spontaneously from regions of higher temperature to regions of lower temperature, in the form of heat.
Why does water in a siphon flows upward against gravity?
Water in a siphon flows upward against gravity due to atmospheric pressure pushing the liquid up the shorter arm of the siphon tube. The weight of the water in the longer arm creates a pressure difference that drives the flow to overcome gravity and flow up the tube.
As the velocity of a fluid increased the pressure exerted by the fluid decreased?
According to Bernoulli's principle, as the velocity of a fluid increases, the pressure exerted by the fluid decreases. This is because when the fluid flows faster, it has more kinetic energy and less pressure energy.
Do the winds move toward a high-pressure area or away from it?
Divergent
