MLT ASCP Practice Test 3 (medical laboratory technicians) Questions With Complete Solution / Guide -Graded A

MLT ASCP Practice (medical laboratory technicians) Questions With Complete Solution / Guide -Graded A What single feature of normal RBCs is most responsible for limiting their life span? a. Loss of mitochondria b. Increased flexibility of the cell membrane c. Reduction of hemoglobin iron d. Loss of the nucleus [Accurate Ans: - d. Loss of the nucleus Intravascular or fragmentation hemolysis is the result of trauma to RBCs in the circulation. True or false. [Accurate Ans: - True Extravascular hemolysis can occur when: a. RBCs are mechanically ruptured b. RBCs extravasate for the blood vessels into the tissues c. Splenic macrophages ingest senescent cells d. Erythrocytes are trapped in blood clots outside the blood vessels [Accurate Ans: - c. Splenic macrophages ingest senescent cells Which RBC process does not require energy? a. Oxygen transport b. Cytoskeletal protein deformability c. Preventing the peroxidation of proteins and lipids d. Maintaining cytoplasm cationic electrochemical gradients [Accurate Ans: - a. Oxygen transport What pathyway anaerobically generates energy in the form of ATP? a. Hexose monophosphate pathway b. Rapoport-Luebering pathway c. Embden-Meyerhof pathway d. 2,3-BPG pathway [Accurate Ans: - c. Embden-Meyerhof pathway To survive, the RBC must detoxify peroxides. What hexose-monophosphate shunt product(s) accomplishes detoxification? a. ATP b. 2,3 BPG c. Pyruvic acid and lactic acid d. NADPH and reduced glutathione [Accurate Ans: - d. NADPH and reduced glutathione Which of the following helps maintain RBC shape? a. Membrane phospholipids b. Cytoskeletal proteins c. GPI anchor d. Glycocalyx [Accurate Ans: - b. Cytoskeletal proteins The glycolipids of the RBC membrane: a. Provide flexibility b. Carry RBC antigens c. Constitute ion channels d. Attach the cytoskeleton to the lipid layer [Accurate Ans: - b. Carry RBC antigens RBC phospholipids are arranged: a. In a hexagonal lattice b. In chains beneath a protein exoskeleton c. In two layers whose composition is asymmetric d. So that hydrophobic portions are facing the plasma [Accurate Ans: - c. In two layers whose composition is asymmetric