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 |
Statement I: | ABO grouping is based on the presence or absence of three surface antigens on the RBCs namely A, B and O. |
Statement II: | Rh grouping is based on the presence or absence of the type of antibody present in the plasma. |
1. | Statement I is correct; Statement II is correct |
2. | Statement I is incorrect; Statement II is incorrect |
3. | Statement I is incorrect; Statement II is correct |
4. | Statement I is correct; Statement II is incorrect |
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 |
During the initiation of coagulation of blood, the platelets are activated by–
1. Thrombin
2. Trauma
3. Ca++
4. Thrombokinase
Assertion(A): | A decrease in lymphocyte count in the blood will lead to an increased susceptibility to infections. |
Reason(R): | Lymphocytes are responsible for phagocytosis in innate immune response. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |
Assertion (A): | The O blood group is considered the universal donor. |
Reason (R): | Both anti-A and anti-B antibodies are present in the plasma of a person with blood group O. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |
Statement I: | Lymph is a colourless fluid containing specialized lymphocytes which are responsible for the immune responses of the body. |
Statement II: | Lymph carries oxygen and nutrients to the tissues. |
If the SA node in the human heart does not function:
1. | it will always lead to cardiac arrest |
2. | the heart rate will be increased due to unopposed sympathetic activity |
3. | the heart rate will be decreased due to unopposed parasympathetic activity |
4. | most likely a group of cells further down the heart will become its pacemaker |