What is true for the blood Type O?
1. | It is universal donor because it has neither anti-A antibodies nor anti-B antibodies circulating in the plasma. |
2. | It is universal donor because it has neither antigen A nor antigen B on its RBCs. |
3. | It is universal recipient because it has neither anti-A antibodies nor anti-B antibodies circulating in the plasma. |
4. | It is universal recipient because it has neither antigen A nor antigen B on its RBCs. |
Assertion (A): | If the SA node does not function, or the impulse generated in the SA node is blocked before it travels down the electrical conduction system, the heart would stop. |
Reason (R): | No other part of the nodal tissue of the heart is capable of generating the impulse. |
In the light of the above statements choose the correct answer from the options given below:
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. | Both (A) and (R) are False. |
Purkinje fibers are:
1. | Intrinsic neural fibers in the ventricles |
2. | Muscle fibers that interconnect SA node and AV node |
3. | Muscle fibers that are distributed in the ventricular musculature |
4. | Neural fibers that spread the impulse throughout the ventricular muscle mass |
All the following statements regarding joint diastole phase of the cardiac cycle are correct except:
1. | All chambers are in a relaxed state |
2. | The AV valves may remain closed in the initial period |
3. | Ventricles get filled in the later part |
4. | Semilunar valves remain open |
A trained athlete can achieve a maximal cardiac output of:
1. | 5 – 10 L/min | 2. | 15 – 20 L/min |
3. | 25 – 30 L/min | 4. | 55 – 60 L/min |
The atria receive:
1. | Oxygenated blood | 2. | Deoxygenated blood |
3. | Mixed blood | 4. | Venous blood |
Normal activities of the human heart are regulated:
1. Intrinsically
2. By the autonomic nervous system
3. By the somatic neural system
4. By the adrenal medullary hormones
An Rh + woman is pregnant with an Rh- fetus. The consequences can be:
1. | There is usually no risk during the first pregnancy, but it can harm the fetus during a subsequent pregnancy if the mother is not treated. |
2. | It always poses a serious risk to the fetus, even in the first pregnancy. |
3. | Only in rare cases is there a risk to the fetus during the first pregnancy. |
4. | There is no risk to the fetus when a woman who is Rh+ carries an Rh- fetus. |
A person has a complete blood count done. Which of the following would not be normal?
1. total RBC count - 5.0 million /µL
2. total WBC count – 1500 /µL
3. total platelet count - 225,000 /µL
4. hemoglobin – 14.5 g / 100 ml
Which of these statements about the ABO blood group is NOT true?
1. | A person with type O blood can donate blood to individuals with type A, B, AB, or O blood types. |
2. | Transfusions should be made considering the plasma of the donor and the erythrocytes of the patient (recipient). |
3. | A person with type A blood should not receive a transfusion from someone with type AB blood. |
4. | A person with type O blood has both the A and B antigens. |