Persons with 'AB' blood group are called as "Universal recipients". This is due to:
1. Presence of antibodies, anti-A and anti-B, on RBCs.
2. Absence of antibodies, anti-A and anti-B, in plasma.
3. Absence of antigens A and B on the surface of RBCs.
4. Absence of antigens A and B in plasma.
Which enzyme is responsible for the conversion of inactive fibrinogens to fibrins?
1. Epinephrine
2. Thrombokinase
3. Thrombin
4. Renin
Which of the following conditions causes erythroblastosis fetalis?
1. Mother and fetus
2. Mother and fetus
3. Both mother and fetus
4. Both mother and fetus
I: | The atria also undergo systole |
II: | The atrioventricular valves get closed |
III: | The semilunar valves are forced open |
1. | is an enzyme formed in and secreted by the platelets |
2. | is an enzyme complex required to convert prothrombin into thrombin |
3. | dissolves the intravascular clots |
4. | prevents coagulation of the blood |