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Blood

QuestionAnswer
Plasma Composition 55%plasma; 7% proteins; 1% other solutes; 92% water
Plasma Proteins Albumins (60%) - transport lipids; steroid hormones, major contributor to osmotic presure of plasma. Globulins (35) - transport ions, hormones,lipids, immune function. Fibrinogen (4) - clotting system. converted to fibrin, reg. proteins - enzymes etc
Blood Type Type A, B, AB and O.Type A = surface A antigen, B antibodies;Type B = B antigen, A antibodies;Type AB = A and B antigen, no antibodies;Type O = no antigen, AB antibodies
Rhesus Factor Rh neg. woman delivers first Rh+ child,fetal + mat. blood mix when placenta breaks down. Rh+ blood sensitizes mother to start producing Rh+ antibodies so during SECOND pregnancy of Rh+ fetus. mat antibodies attack fetal blood cells = hemolytic disease
Vascular Phase local contraction of a vessel= vascular spasm. decreases diameter of vessel at site of injury. slows/stops loss of blood thru wall of small vessel. vascular spasm lasts 30 min = vascular phase
Vascular Phase II -endothelial cells contract and expose underlying basal lamina to blood stream -EC release chemical factors and local hormones (stimulate smooth mus contractions and division of endothelial cells to repair) -membranes become sticky (so platelets can ath
Platelet Phase -platelet adhesion to surface then platelet aggregation as more platelets stick together which forms a platelet plug
Created by: zeenat on 2008-03-05



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