Blood

Which of the following is a pivotal molecule associated with the external surfaces of aggregated platelets and is involved in the intrinsic and extrinsic mechanisms of blood clotting? A) Thrombin B) PF3 C) PGI2 D) Thromboplastin (prothrombin activator) correct answer: B) PF3 What is the average normal pH range of blood? A) 8.35-8.45 B) 7.75-7.85 C) 4.65-4.75 D) 7.35-7.45 correct answer: D)7.35-7.45 The special type of hemoglobin present in fetal red blood cells is ________. A) h...