1. Quelle est la composition approximative du volume sanguin chez l'adulte ?
2. Quelle est la composition en volume du sang chez l'adulte, et quelle proportion de plasma y est contenue?
3. Quel composant du plasma est principalement responsable du maintien de la pression osmotique et du transport des lipides ?
Transport O2
98,5% lié à l’hémoglobine, P50=25 mmHg
Volume sanguin adulte
5,5 L, 55% plasma, 45% éléments figurés
Propriétés du plasma
pH 7,35-7,45, osmolarité 300 mosm/L
Composants du plasma
93% eau, électrolytes, protéines, lipides, nutriments, déchets
Composition du sang
5,5 L, 45% hématies, 55% plasma
Électrolytes principaux
Na+, Cl−, K+, Ca2+, bicarbonates
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