Q. No.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
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 |
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 |
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 |
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 |
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
The least common of WBCs in the human blood are:
| 1. | Eosinophils | 2. | Lymphocytes |
| 3. | Neutrophils | 4. | Basophils |
The enzyme that activates fibrinogens in the blood is:
| 1. | Thromboplastin | 2. | Thrombokinase |
| 3. | Thrombin | 4. | Plasmin |
Which of the following can be called as a ‘cascade’ process?
| 1. | Micturition reflex |
| 2. | Formation of cross bridges in skeletal muscle contraction |
| 3. | Coagulation of blood |
| 4. | Regulation of respiration |
To begin the blood clot formation cascade, the enzyme complex required is:
| 1. | Thromboxane A2 | 2. | Thrombin |
| 3. | Thrombokinase | 4. | Heparin |
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