Q. No.Which of the following can be called as a ‘cascade’ process?
1. Micturition reflex
2. Formation of cross bridges in skeletal muscle contraction
3. Coagulation of blood
4. Regulation of respiration
1. Micturition reflex
2. Formation of cross bridges in skeletal muscle contraction
3. Coagulation of blood
4. Regulation of respiration
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The deoxygenated blood from the cardiac muscles is returned to the right atrium by:
| 1. coronary sinus | 2. pre-caval vein |
| 3. post-caval vein | 4. pulmonary veins |
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Identify the incorrectly matched pair:
1. Average duration of a cardiac cycle: 0.8 sec
2. Stroke volume of each ventricle: 120 ml
3. Highest normal systolic blood pressure: 140 mm Hg
4. Highest normal diastolic blood pressure: 90 mm Hg
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To begin the blood clot formation cascade, the enzyme complex required is:
| 1. | Thromboxane A2 | 2. | Thrombin |
| 3. | Thrombokinase | 4. | Heparin |
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A person has type A antigen on RBC and anti-B antibodies in plasma. He can receive blood from a person with blood group:
| 1. | A and O | 2. | AB, A, B and O |
| 3. | B and O | 4. | Only O |
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In the nodal tissue of the human heart, a conduction delay is seen in:
| 1. SA node | 2. AV node |
| 3. AV bundle | 4. Purkinje fibers |
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All vertebrates posses a:
| 1. muscular chambered heart | 2. renal portal system |
| 3. nucleated RBC | 4. double circulation |
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To prevent eryhtroblastosis fetalis in future pregnancies:
| 1. | Anti-Rh Immunoglobulins must be given to Rh –ve mothers at the time of each delivery |
| 2. | Anti-Rh Immunoglobulins must be given to new born at the time of each delivery |
| 3. | Rh Antigens must be given to new born at the time of each delivery |
| 4. | Anti Antigens must be given to Rh –ve mothers at the time of each delivery |
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Another name for lymph would be:
| 1. Extra-cellular fluid | 2. Tissue fluid |
| 3. Plasma ultrafiltrate | 4. Serous fluid |
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During ventricular contraction in a cardiac cycle:
1. the AV valves close earlier than the opening of semi lunar vales
2. the AV valves close earlier than the closure of semi lunar vales
3. the AV valves close later than the opening of semi lunar vales
4. the closure of AV valves and opening of semi lunar valves occur simultaneously
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