Activity 26.1 Examining Pulmonary Ventilation Pulmonary ventilation is the movem

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Activity 26.1 Examining Pulmonary Ventilation Pulmonary ventilation is the movement of air into and out of the lungs. It form between the air in the atmosphere (atmospheric pressure) an pressure). Air will flow from an area of high pressure to an area of pressure) and the air in the airways (intrapu by pressure gradients that According to Boyle's law, the pressure of a gas, in a closed container at constant temperature, is inversely proportional low pres to its volume 0 The gas pressure inside a closed container with a fixed concentration of gas molecules is the result of collisions between the gas molecules and between the molecules and the sides of the container. the volume of how will the pressure how will the Explain. If the volume of the box increases, how will the pressure change? Explain. if intrapulmonary pressure is greater than atmospheric pressure If intrapulmonary pressure is less than atmospheric pressure, air will flow into the lungs (inhalation). Conversely, air will low out of the lungs (exhalation). During exhalation, the thoracic volume decreases. Explain why air flows out of the lungs at this time At the end of an exhalation and just before the next inhalation, the intrapulmonary pressure equals the atmospheric pressure. Explain why air will not move into or out of the lungs at this time During inhalation, the thoracic volume increases. Explain why air flows into the lungs at this time Physioxtxerdise 7:Respin ngA&P; Study more practice? Go to: MasteringA&P;> Study Area > Menu > Lab Tools > Ph factant and Intrapleural Pressure on Respiration

Explanation / Answer

A. 1. If the volume of the box increases the pressure inside the box will decrease as the space for the movement of molecule will increase and thus less collison will occur and thus pressure will decrease.

A. 2. If the volume of the box decreases the pressure inside the box will increase as the space for the movement of molecule will decrease and thus more collison will occur and thus pressure will increase.

B. 1. Air always move from higher pressure to lower pressure but here the pressure inside the pulmonery is equal to atmospheric pressure and thus, air will not move into or out of the lungs.

B. 2. When thoracic volume increases, the pressure inside the thoracic cavity decreases and air always moves from higher pressure to lower pressure and thus inhalation occurs.

B. 3. During exhalation, thoracic volume decrease and thus pressure inside the thoracic cavity increases which allow the gases to come out from the lungs and hence exhalation occurs.

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