Q. No.
The risk of the fetus developing hemolytic disease of the new born is present in:
1. any Rh+ fetus
2. second Rh- fetus of Rh+ mother
3. second Rh+ fetus of Rh- mother
4. Rh- mother
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The volume of blood being pumped by the heart, in particular by the left or right ventricle, per unit time is called as:
| 1. stroke volume | 2. end-diastolic volume |
| 3. ejection fraction | 4. cardiac output |
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QRS complexes on the ECG tracings show that:
1. The atria are depolarizing.
2. The ventricles are depolarizing.
3. The ventricles are repolarizing.
4. The heart is at rest.
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The aortic semilunar valve prevents blood from returning to the _____.
| 1. | left ventricle | 2. | aorta |
| 3. | right ventricle | 4. | left atrium |
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In the nodal tissue of the human heart the last to get activated is/are:
1. SA node
2. AV node
3. AV bundle
4. Purkinje fibers
The central cardiac control region is in the _____ of the brain.
| 1. hypothalamus | 2. medulla oblongata |
| 3. cerebellum | 4. pons |
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Heart murmurs are heart sounds produced when blood flows across one of the heart valves that are loud enough to be heard with a stethoscope. A common cause would be:
1. smoking which weakens the action of the valve
2. ineffective valves allowing blood to leak back through the valve
3. stress from higher blood pressure
4. ineffective signals from the AV node
Blood pressure is the pressure of blood against:
1. the left ventricle
2. the tissue of the organs
3. the capillaries of the lung
4. the wall of a blood vessel
Pulmonary veins return the oxygenated blood from the lungs to:
| 1. | right atrium | 2. | left atrium |
| 3. | right ventricle | 4. | left ventricle |
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