1. | 72 per minute | 2. | 75 per minute |
3. | 80 per minute | 4. | 100 per minute |
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 |
1. | Pons varoli | 2. | Medulla oblongata |
3. | Hypothalamus | 4. | Cerebrum |
1. | is a bone marrow stem cells committed to produce RBCs |
2. | is the megakaryocyte |
3. | is the commonest WBC and is phagocytic |
4. | is responsible for acquired immunity in humans |
I: | SA node is the natural pacemaker of the human heart. |
II: | SA node is the only part of that nodal musculature that is auto-excitable. |
1. | Only I is correct |
2. | Only II is correct |
3. | Both I and II are correct |
4. | Both I and II are incorrect |