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RPhysOverview
Respiratory Physiology overview
Question | Answer |
---|---|
Oxygen is what percentage of dry air? | 21% |
What is the site of internal respiration? | Mitochondria |
What is the purpose of external respiration? | No maintain mitochondrial respiration with a continual supply of oxygen |
Ventilation and circulation are controlled | Centrally |
Po2 of air | 159mmHg |
Po2 in alveoli | 100mmHg |
Po2 in arteries | 96mmHg |
Po2 in veins | 40mmHg |
Po2 in cells | 20mmHg |
Pco2 in air | 0mmHg |
Pco2 in alveoli | 40mmHg |
Pco2 in veins | 46mmHg |
What is a partial pressure? | Pressure that a gas would exert if it occupied the total volume of the mixture in the absence of other components |
Ph2o at 37 degrees | 47 mmHg |
What is the role of hemoglobin? | To drastically increase the amount of Oxygen in the blood |
Equation for Po2 in moist inspired air | (Barometric pressure-47) x .2093 |