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27 Cards in this Set
- Front
- Back
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In the conducting zone, what does not occur?
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Gas exchange
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The conducting zone has a volume of?
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150 ml
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The conducting zone is know as anatomical dead space because?
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No gas exchange occurs here
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Total lung capacity is?
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6000 ml
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Vital capacity is ?
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5000 ml
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Residual volume is?
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1000 ml
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Total LNG capacity is equal to?
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Vital capacity + residual vol
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Dalton's law states?
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In a mix of gases pressure of each is independent of the others
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Henry's law states?
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The amount of gas diffusing into a liquid is proportional to its partial pressure.
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Breathing in (contraction) causes
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An increase of volume so air flows in
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Breathing out (relaxing) causes
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A decrease in volume so air flows out
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Oxygen is transported by two means, what are these?
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Bound to heamoglobin and dissolved in plasma
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Inspiratory reserve equals?
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3000 ml
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Resting tidal volume equals?
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500 ml
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Expiratory reserve volume equals?
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1500 ml
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Resting O2 consumption is?
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250 ml/min
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O2 carrying capacity is ultimately determined by?
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Concentration of heamoglobin in blood
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When pH decreases Hb is ?
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Less saturated
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When pH increases Hb is?
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More saturated
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The respiratory rhythmicity cent is located in the?
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Medulla oblongata
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The respiratory rhythmicity centre contains inspiratory neurones that drive?
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Motor neurones which inner ate diaphragm and intercostal muscles.
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Medullary respiratory neurones are affected by?
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Brain, drugs, pulmonary stretch receptors, chemoreceptors
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Central chemoreceptors respond to?
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Changes in brain extracellular H+ concentration
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Central chemoreceptors are found in the ?
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Medulla
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A 10% rise in pCO2 will?
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Double respiratory rate
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When PCO2 increases what also increases due to co2 conversion with water?
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H+ concentration
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Peripheral chemoreceptors are located where?
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In carotid and aortic bodies
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