respiratoire: échanges gazeux Flashcards

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1
Q

comment diffuse?

A

selon gradient de pression partielle
de Pp + à Pp -

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2
Q

rapports de gaz

A

air inspiré: + O2
MAC: + O2
artères circulation systémique: + O2
tissus: + CO2
veines circulation systémique: + CO2
air expiré: + O2

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3
Q

transport O2

A

forme dissoute dans plasma (PO2)
lié à Hb (4)

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4
Q

affinité de Hb pour O2

A

si PO2 +++ = grande affinité (fixation)

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5
Q

effet bohr

A

si pH faible : - affinité
PCO2 ++ = libération O2

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