Gas in solution is proportional to partial pressure of gas and solubility of gases.
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Why is expired gas different to alveolar gas?
it has to pass back through the trachea so it mixes with gases in the dead space.
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What is Fick's Law?
Vgas= A.P.(P1-P2)/T
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Where are central chemoreceptors found?
In the brain stem
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Where are peripheral chemoreceptors found?
Near arteries
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What is Fick's Law used for?
to describe the relationship between permeability and the concentration gradient and net flux.
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When are peripheral chemoreceptors activated?
A low PO2 increases the sensitivity for the carbon dioxide receptors. Changes in hydrogen ion concentration are the primary stimulus for peripheral chemoreceptors.
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What do central chemoreceptors respond to?
changes in hydrogen ion concentration in the CSF. These chemoreceptors are not sensitive to oxygen pressure.
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Other cards in this set
Card 2
Front
Why is expired gas different to alveolar gas?
Back
it has to pass back through the trachea so it mixes with gases in the dead space.
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