MLS Hematology Exam| 263 QUESTIONS| WITH COMPLETE SOLUTIONS

What is the first type of cell produced by the developing embryo? Correct Answer: Erythrocyte What percentage of tissue located in the bone marrow cavities of adults is fat? Correct Answer: 50% Which of the following is not characteristic of pluripotent hematopoietic stem cells? Correct Answer: Express the stem marker CD13 In an adult, what are the two best areas for obtaining active bone marrow by aspiration? Correct Answer: Posterior iliac crest, sternum What is the normal ratio of myeloid to erythroid precursors in bone marrow (M:E ratio)? Correct Answer: 4:1 Which of the following does not accurately describe hematopoietic growth factors? Correct Answer: Action of majority is lineage restricted In the third month of gestation, what is the primary site of hematopoiesis? Correct Answer: Liver The mechanism that relays information about tissue oxygen levels to erythropoietin-producing sites is located in the: Correct Answer: Kidney Antigen-independent lymphopoiesis occurs in primary lymphoid tissue located in the: Correct Answer: Thymus and bone marrow Programmed cell death is called: Correct Answer: Apoptosis In what area of the bone marrow does hematopoiesis take place? Correct Answer: Cords Bone marrow cellularity refers to the ration of: Correct Answer: Hematopoietic tissue to adipose tissue Interleukins and colony stimulating factors are cytokines produced by: Correct Answer: Monocytes and T lymphocytes What is the approximate total blood volume in an adult? Correct Answer: 6 L The myeloid progenitor cell can produce cells committed to: Correct Answer: Granulocytic, erythrocytic, monocytic, or megakaryocytic lineages The largest hematopoietic cells in