Q. No.The second heart sound [dub] is associated with simultaneous closure of:
1.
Right AV and pulmonary semilunar valve
2.
Left AV and aortic semilunar valve
3.
Right and left AV valves
4.
Right and left semilunar valves
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The least common of WBCs in the human blood are:
| 1. | Eosinophils | 2. | Lymphocytes |
| 3. | Neutrophils | 4. | Basophils |
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1. Ventricular depolarization
2. Ventricular repolarization
3. Atrial depolarization
4. Atrial repolarization
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The enzyme that activates fibrinogens in the blood is:
| 1. | Thromboplastin | 2. | Thrombokinase |
| 3. | Thrombin | 4. | Plasmin |
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Blood enters the heart because muscles of the:
| 1. | ventricles relax | 2. | ventricles contract |
| 3. | atria relax | 4. | atria contract |
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Under normal physiological conditions, when compared to pulmonary circulation:
1. the amount of blood circulated in systemic circulation is more
2. the amount of blood circulated in systemic circulation is less
3. the pressure of blood circulated in systemic circulation is more
4. the pressure of blood circulated in systemic circulation is less
What would be the approximate volume of blood pumped by both ventricles under normal resting physiological conditions in a healthy human adult?
| 1. | 10 L | 2. | 8 L |
| 3. | 5 L | 4. | 2.5 L |
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The portal systems seen in humans include:
I: Hepatic portal system
II: Renal portal system
III: Hypothalamic Hypophyseal portal system
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II and III |
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When the heart muscle is suddenly damaged by an inadequate blood supply, the condition is called as:
| 1. | Heart failure | 2. | Heart block |
| 3. | Heart attack | 4. | Cardiac arrest |
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Passive filling accounts for about what percent of ventricular filling?
| 1. | 30 | 2. | 50 |
| 3. | 70 | 4. | 90 |
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