Red Blood Cells and Platelet Preservation: Historical Perspectives and Current Trends

Chapter 1. Red Blood Cells and Platelet Preservation: Historical Perspectives and Current Trends Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Which metabolic pathway is responsible for generating 90% of the ATP for the RBC? a. Pentose phosphate shunt c. Glycolysis b. Luebering-Rapoport shunt d. Methemoglobin reductase ____ 2. A unit of blood was returned to the blood bank before it was spiked. Apparently the patient’s IV failed. The unit of blood was outside the blood bank for 35 minutes. Which of the statements below is most accurate? a. The unit of blood should be discarded immediately. b. The unit of blood can be returned to inventory. c. The unit of blood must be transfused within 4 hours or be discarded at the end of that time. d. The unit of blood must be transfused with 24 hours. ____ 3. What is the average diameter of a platelet? a. 5 to 10 µm c. 1 to 2 µm b. 2 to 4 µm d. 4 to 6 µm ____ 4. In the normal hemoglobin-oxygen dissociation curve, what percentage of oxygen is released to the tissues when PO2 averages 40 mm Hg? a. 75% c. 100% b. 25% d. 50% ____ 5. What factors are known to influence platelet metabolism and function? a. Storage temperature c. Platelet count b. Initial pH d. All of the above ____ 6. Which of the following red blood cell morphologies may be present on the peripheral blood smear as a result of loss of RBC membrane? a. Spherocytes c. Burr cells b. Target cells d. Schistocytes ____ 7. What does the term autologous transfusion refer to? a. A parent donating blood for his or her child b. An individual donating blood for a friend c. An individual donating blood for a relative d. An individual donating blood for his or her own transfusion