Which of the choices below is the parent cell for all formed elements of blood? O polymorphonuclear cell normoblast hemocytoblast megakaryocyte In clotting, prothrombin activator catalyzes prothrombin into thrombin, which in turn converts fibrinogen into fibrin. True O False If a person is severely dehydrated you would expect to see all of the following EXCEPT O higher hematocrit O higher blood viscosity O lower plasma levels lower immunity Which blood type is generally called the universal donor? O negative 3 negative A positive OAB positive If a patient with type B blood received a transfusion of AB blood, which of the following would occur? The patient's anti-A antibodies (agglutinins) will agglutinate with the A antigens (antiglutinogens) in the donor blood. The patient's anti-B antibodies (agglutinins) will agglutinate with the B antigens (agglutinins) in the donor blood. O The patient's B antigens (antiglutinogens) will agglutinate with the anti-B antibodies (agglutinins) in the donor blood. O The patient's A antigens (antiglutinogens) will agglutinate with the anti-A antibodies (agglutinins) in the donor blood. Which of the following would NOT be a possible cause of sickling of red blood cells in someone with sickle-cell anemia? malaria prolonged exposure to cold O vigorous exercise O travel at high altitude A person exhibiting suppression of immunity and clotting disorder as well as low oxygen- carrying capacity is likely suffering from which of the following? aplastic anemia O pernicious anemia O iron deficiency anemia O hemorrhagic anemia