MLS Hematology Exam

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