The first and the second heart sounds are produced respectively by:
1.
the closure of the atrioventricular and the opening of the semilunar valves
2.
the opening of the atrioventricular and the closure of the semilunar valves
3.
the closure of the atrioventricular and semilunar valves
4.
the opening of the atrioventricular and semilunar valves
Subtopic: Â Human Heart: Cardiac Cycle |
 85%
From NCERT
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Erythroblastosis foetalis can be avoided by administering anti-Rh antibodies to the:
| 1. | mother between 20 weeks and 24 weeks of pregnancy |
| 2. | mother early in pregnancy |
| 3. | mother immediately after the delivery of the child |
| 4. | new-born immediately after the delivery |
Subtopic: Â Blood: Blood Group |
 88%
From NCERT
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Atrial systole increases the flow of blood into the ventricles by about:
1. 30 %
2. 50 %
3. 70 %
4. 90 %
1. 30 %
2. 50 %
3. 70 %
4. 90 %
Subtopic: Â Human Heart: Cardiac Cycle |
 83%
From NCERT
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The most abundant and the least abundant of the total WBCs, respectively are:
1. Neutrophils and Monocytes
2. Eosinophils and Basophils
3. Neutrophils and Basophils
4. Monocytes and Eosinophils
1. Neutrophils and Monocytes
2. Eosinophils and Basophils
3. Neutrophils and Basophils
4. Monocytes and Eosinophils
Subtopic: Â Blood: White Blood Cells |
 88%
From NCERT
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The plasma of a person has both anti-A and anti-B antibodies. The blood type of this person will be:
1. Type O
2. Type AB
3. Type A
4. Type B
1. Type O
2. Type AB
3. Type A
4. Type B
Subtopic: Â Blood: Blood Group (A,B,O) |
 87%
From NCERT
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The end of systole is marked on the ECG by:
1. Beginning of P wave
2. End of the Q wave
3. End of the T wave
4. Beginning of S wave
Subtopic: Â ECG & Coronary Artery Disease |
 80%
From NCERT
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The risk of erythroblastosis foetalis exists when:
| 1. | an Rh positive mother is carrying an Rh negative foetus |
| 2. | an Rh negative mother is carrying an Rh positive foetus |
| 3. | an Rh positive mother is carrying an Rh positive foetus |
| 4. | an Rh negative mother is carrying an Rh negative foetus |
Subtopic: Â Blood: Blood Group |
 92%
From NCERT
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Which of the following recording of the blood pressure in a human adult will not be considered as abnormal?
1. 120/100 mm Hg
2. 110/70 mm Hg
3. 170/80 mm Hg
4. 150/95 mm Hg
1. 120/100 mm Hg
2. 110/70 mm Hg
3. 170/80 mm Hg
4. 150/95 mm Hg
Subtopic: Â DISORDERS OF CIRCULATORY SYSTEM |
 62%
From NCERT
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Consider the given two statements:
Assertion: SA node acts as the normal pacemaker of the human heart.
Reason: SA node is located in the wall of the right atrium.
1. Assertion is true but Reason is false
2. Both Assertion and Reason are true and the Reason correctly explains the Assertion
3. Both Assertion and Reason are true but the Reason does not correctly explain the Assertion
4. Assertion is false but Reason is true
Subtopic: Â Human Heart: Gross Anatomy |
 71%
From NCERT
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Identify the incorrectly matched pair:
| 1. | Heart failure | The state of heart when it is not pumping blood effectively enough to meet the needs of the body. |
| 2. | Heart attack | The heart muscle is suddenly damaged by an inadequate blood supply. |
| 3. | Angina pectoris | Acute chest pain when excess oxygen is reaching the heart muscle due to vasodilation. |
| 4. | Cardiac arrest | The heart abruptly stops beating. |
Subtopic: Â DISORDERS OF CIRCULATORY SYSTEM |
 79%
From NCERT
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