Q. No.During the RBC cycling, all the following can occur except:
1. amino acids can be recycled into new proteins
2. the entire heme group is eliminated by the liver
3. iron is removed before heme is converted to bilirubin
4. liver dysfunction can cause accumulation of bilirubin in the body
1. amino acids can be recycled into new proteins
2. the entire heme group is eliminated by the liver
3. iron is removed before heme is converted to bilirubin
4. liver dysfunction can cause accumulation of bilirubin in the body
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
Once released from the bone marrow into the circulation, the average life span of a red blood cell is about
1. 72 hours
2. one week
3. 4 months
4. 2 years
Platelet plug formation is initiated when platelets come into contact with
1. undamaged endothelial cells.
2. fibrinogen in the connective tissue beneath damaged blood vessels.
3. collagen fibers in the connective tissue beneath damaged blood vessels.
4. antithrombin.
An intravascular clot and its fragments are respectively called as:
1. hematoma; thrombosis
2. thrombus; hematoma
3. thrombus; embolus
4. embolus; thrombus
The cytoplasmic granules released by thrombocytes during platelet plug formation, which attract more platelets to the plug are:
1. prostacyclin and NO
2. erythropoietin and bilirubin
3. heparin and plasmin
4. ADP and thromboxanes
Coagulation of blood can be prevented by removal of which of the following in the blood?
| 1. | transferrin | 2. | iron |
| 3. | antibodies | 4. | calcium |
A person comes to the ER with a need of blood transfusion. How would you determine his blood type?
1. By mixing his blood with the blood of another person of known blood type and if there is no reaction they are the same type.
2. By looking at red blood cells under a microscope to see what kind of antigens are on their membranes.
3. By checking to see which plasma antibodies a person has and he won't have antibodies against his own blood type.
4. By mixing the blood with different antibodies to see which ones cause the red blood cells to agglutinate.
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. |
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. |
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