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Q. No.During the initiation of coagulation of blood, the platelets are activated by–
1. Thrombin
2. Trauma
3. Ca++
4. Thrombokinase
1. Thrombin
2. Trauma
3. Ca++
4. Thrombokinase
Subtopic: Blood: Blood Clotting |
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A person with AB blood group:
| 1. | Has A and B antigens in his plasma |
| 2. | Has antibodies on RBC surface |
| 3. | Can receive blood transfusion from a person of his own group. |
| 4. | Can donate blood to all other group recipients |
Subtopic: Blood: Blood Group (A,B,O) |
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The correct statements amongst the following are:
| I: | Cardiac output is volume of blood pumped by each ventricle per minute |
| II: | All the four chambers of human heart are never in diastole together |
| III: | The first heart sound is associated with opening of atrioventricular valves |
| IV: | The pressure in pulmonary artery is equal to the pressure in aorta |
| 1. | Only I | 2. | Only I and IV |
| 3. | Only I and III | 4. | Only I, II and IV |
Subtopic: Human Heart: Cardiac Cycle |
From NCERT
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What would be the heart rate of a person if the cardiac output is 5L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?
| 1. | 125 beats per minute | 2. | 50 beats per minute |
| 3. | 75 beats per minute | 4. | 100 beats per minute |
Subtopic: Human Heart: Cardiac Cycle |
60%
From NCERT
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Persons with AB blood type can:
| 1. | donate blood to persons with all blood types as neither A nor B antigens are present on their RBCs |
| 2. | receive blood from persons with all blood types as both A and B antigens are present on their RBCs |
| 3. | receive blood from persons with all blood types as neither A nor B antigens are present on their RBCs |
| 4. | receive blood from persons with all blood types as neither anti-A nor anti-B antibodies are present on his blood plasma |
Subtopic: Blood: Blood Group (A,B,O) |
From NCERT
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If the heart rate is 60 per minute, the duration of each cardiac cycle will be:
| 1. | 0.8 seconds | 2. | 0.75 seconds |
| 3. | 1.0 second | 4. | 1.2 second |
Subtopic: Human Heart: Cardiac Cycle |
56%
From NCERT
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Which of the following cells of areolar connective tissue are also present in blood?
1. Fibroblasts
2. Eosinophils
3. Macrophages
4. Mast cells
1. Fibroblasts
2. Eosinophils
3. Macrophages
4. Mast cells
Subtopic: Blood: White Blood Cells |
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Read the given statements and select the correct option
1. Both statements A and B are correct
2. Both statements A and B are incorrect
3. Only statement A is correct
4. Only statement B is correct
| A: | White blood cells are enucleated and are relatively lesser in number which averages 6000-8000 mm-3 of blood |
| B: | Human heart is protected by a three walled membranous bag, pericardium |
2. Both statements A and B are incorrect
3. Only statement A is correct
4. Only statement B is correct
Subtopic: Blood: General Description & RBC |
52%
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How many of the given statements are correct:
| I: | Fishes have a 2-chambered heart with an atrium and a ventricle. |
| II: | Amphibians and the reptiles (except crocodiles) have a 3-chambered heart with two atria and a single ventricle. |
| III: | Crocodiles, birds and mammals possess a 4-chambered heart with two atria and two ventricles. |
| IV: | The only vertebrates where the heart pumps out deoxygenated blood are fishes. |
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | 4 |
Subtopic: Circulatory Pathways |
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Consider the two statements:
| Assertion (A): | Adrenal medullary hormones can increase the cardiac output. |
| Reason (R): | Adrenal medullary hormones are steroids with prominent effects on osmoregulation and glucose homeostasis in human body. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Regulation of Cardiac Activity |
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