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Physiology
Lungs
Lungs (3)
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Created by
Jessica adejko
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Cards (5)
Inspiration
1. Brain signals the phrenic nerve
2. Phrenic nerve stimulates the diaphragm (muscle) to contract
3. When diaphragm contracts it moves down making the thoracic cavity larger
4. When volume increases, pressure decreases
5. Air moves from are of higher pressure (atm) to an area of lower pressure (lungs)
6. When alveolar pressure becomes equal to atmospheric pressure, thorax stops expanding and airflow stops
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Respiratory
muscles for inhalation
External intercostals
Diaphragm
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Lung
compliance
Lung stretchability
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Determinants
of lung compliance
Elasticity
Surface tension
forces
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Quiet
breathing
Exhalation results from
passive recoil
of lungs and ribcage
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