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15 Cards in this Set
- Front
- Back
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ventilation is taking ____ in & out of lungs
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air
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ventilation is the process of inspiration & ____
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expiration
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ventilation is dependent upon the difference in pressure in ____ & ____ ____
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alveoli - outside atmosphere
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2 pressure relationships in the thoracic cavity
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intrapulmonary pressure - intrapleural pressure
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intrapulmonary pressure is within the ____
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alveoli
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intrapulmonary pressure changes during
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breathing
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intrapulmonary pressure always equalizes with ____ ____
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atmospheric pressure (760mm Hg sea level)
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intrapleural pressure is within the ____ ____
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pleural cavity
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intrapleural pressure can ____ (change)
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fluctuate
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intrapleural pressure maintains __mm less pressure than in ____ (negative)
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alveoli
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intrapleural pressure is created by the ____ expanding faster than the lungs in ____ development
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thorax - fetal
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atelectasis means ____ ____
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lung collapse
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any condition that equalizes the ____ pressure with the ____ pressure causes the lungs to collapse (atelectasis)
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intrapleural - intrapulmonary
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2 forces pushing the lungs (visceral pleura) towards the thorax wall (parietal wall)
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greater intrapulmonary pressure than intrapleural pressure - adhesive force created by the fluid in the pleural cavity
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2 forces pulling the lungs (visceral pleura) away from the thorax wall (parietal pleura)
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tendency of elastic fibers in lungs to recoil - surface tension within alveoli draw them back to their smallest dimension
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