Q. No.A normal hematocrit value of 45 means that ________________.
1. 45% if the formed elements are erythrocytes
2. there are 45 million formed elements per ml of whole blood
3. 45% of the total blood volume is formed elements
4. 45 ml of plasma are tested by centrifugation
1. 45% if the formed elements are erythrocytes
2. there are 45 million formed elements per ml of whole blood
3. 45% of the total blood volume is formed elements
4. 45 ml of plasma are tested by centrifugation
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The type of antigen on the surface of RBC and the type of antibodies in plasma of person with genotype would respectively be:
| 1. B; anti B | 2. A; anti B |
| 3. A; anti A | 4. B; anti A |
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Identify the incorrect statement regarding the hemolytic disease of the newborn:
| 1. | The fetus is Rh positive, and the mother is Rh negative. |
| 2. | The mother's immune system has made antibodies against the Rh factor present on the red blood cells of the previous baby. |
| 3. | The baby is born with an abnormally high number of red blood cells. |
| 4. | This can be prevented if the Rh negative mother has been given RhoGAM (antibodies). |
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When a blood vessel gets injured, the first event to occur in hemostasis is:
1. The endothelial lining is damaged, exposing collagen proteins to the blood.
2. The injured blood vessel is dilated by newly released chemicals to let in defense cells.
3. Platelets become "sticky" and a platelet plug is formed near the injury site.
4. A web of fibrin protein strands tightly interweave the platelet plug.
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What is the average duration of diastole and systole in a cardiac cycle lasting 0.8 seconds?
1. 0.3 seconds; 0.5 seconds
2. 0.4 seconds; 0.4 seconds
3. 0.5 seconds; 0.3 seconds
4. 0.6 seconds; 0.2 seconds
How would the right heart compared to the left during one cardiac cycle?
1. left heart pumps a lesser volume of blood than the right heart
2. right heart contracts shortly before the left heart
3. right heart pumps blood with less force (at lower pressure) than the left heart
4. left heart has a shorter cardiac cycle duration than the right heart
A person has atrial septal defect [hole in the interatrial septum]. This would result in the abnormal flow of blood from:
1. the right side of the heart to the left
2. the left side of the heart to the right
3. the pulmonary artery to the aorta
4. the ductus arteriosus to the aorta
The plateau in the cardiac action potential is primarily due to:
1. slow outward diffusion of
2. fast inward diffusion of
3. fast outward diffusion of
4. slow inward diffusion of
Artificial pacemakers can be used to treat a patient suffering from:
1. a myocardial infarction
2. atherosclerosis
3. a third degree AV node block
4. mitral stenosis
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