| 1. | Monocytes | 2. | Macrophages |
| 3. | Neutrophils | 4. | All of these |
| 1. | Erythrocytes | 2. | Granulocytes |
| 3. | Thrombocytes | 4. | Agranulocytes |
| 1. | A to AB | 2. | B to AB |
| 3. | O to O | 4. | A to O |
| 1. | The entire nodal tissue from sino-atrial node to purkinje fibres has the ability to generate action potentials |
| 2. | All parts of nodal tissue can generate same number of action potentials per minute |
| 3. | Both sino-atrial and atrio-ventricular nodes are present in right atrium |
| 4. | Sino-atrial node normally acts as the pacemaker |
| 1. | 6000-8000 | 2. | 50000 -70000 |
| 3. | 150000 -350000 | 4. | 400000-500000 |
| 1. | Erythrocytes | 2. | Leucocytes |
| 3. | Platelets | 4. | Plasma proteins |