Q. No.Cardiac activity could be moderated by the autonomic nervous system. Tick the correct answer:
1. The parasympathetic system stimulates heart rate and stroke volume
2. The sympathetic system stimulates heart rate and stroke volume
3. The parasympathetic system stimulates heart rate but decreases stroke volume
4. The sympathetic system stimulates heart rate but decreases stroke volume
1. The parasympathetic system stimulates heart rate and stroke volume
2. The sympathetic system stimulates heart rate and stroke volume
3. The parasympathetic system stimulates heart rate but decreases stroke volume
4. The sympathetic system stimulates heart rate but decreases stroke volume
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A vein, in general, can be distinguished from an artery by:
| 1. | Absence of valves | 2. | Thin tunica media |
| 3. | Absence of tunica externa | 4. | Absence of tunica media |
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Platelets are cell fragments that:
| I: | are produced from megakaryocytes in the spleen in fetal life |
| II: | can release variety of factors involved in blood coagulation |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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Both heart rate and stroke volume in a human get doubled during exercise. His cardiac output will:
| 1. | double | 2. | become four times |
| 3. | become eight times | 4. | remain the same |
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What would be true for the white blood cell shown in the given diagram?
1. They differentiate into phagocytic cells
2. They secrete histamine and heparin in the blood
3. They are responsible for providing adaptive immunity in vertebrates
4. Their number is increased in acute bacterial infections
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An Rh –ve person, when exposed to Rh +ve blood:
| 1. | will form antibodies against the Rh antigen |
| 2. | will be unaffected |
| 3. | will form antibodies against the Rh antigen only on second exposure |
| 4. | will receive anti Rh antibodies from the donor |
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Identify the incorrectly matched pair:
| 1. | Plasma protein | – | 6 to 8 % |
| 2. | Formed elements | – | 55% of the blood |
| 3. | Hemoglobin | – | 12 to 16 gm in 100 ml of blood |
| 4. | Platelets | – | 150000 to 350000 mm-3 |
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When anti B antibodies are present in the plasma and A antigens on the surface of RBCs of a person, her blood group can be:
| 1. | A and AB | 2. | Only A |
| 3. | Only B | 4. | O |
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Inter-atrial septum in the human heart is:
| 1. | a thin muscular wall | 2. | a thick muscular wall |
| 3. | a thin membranous wall | 4. | a thick membranous wall |
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Which of the following would not be normal in a healthy human being?
1. A cells/blood ratio of 45%
2. A plasma albumin concentration of 4%
3. An RBC count of 5.2 million mm-3
4. A hemoglobin level of 15 gram per liter
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