5 Questions
Which of the following is the first type of cell produced by the developing embryo?
Erythrocyte
In an adult, what are the two best areas for obtaining active bone marrow by aspiration?
Anterior iliac crest, tibia
What percentage of tissue located in the bone marrow cavities of adults is fat?
75%
What is the normal ratio of myeloid to erythroid precursors in bone marrow (M:E ratio)?
4:1
Which of the following is not characteristic of pluripotent hematopoietic stem cells?
Produce progenitor cells committed to a single cell lineage
Study Notes
Embryonic Development
- The first type of cell produced by the developing embryo is a hematopoietic stem cell.
Bone Marrow
- The two best areas for obtaining active bone marrow by aspiration in an adult are the iliac crest and the sternum.
- In adults, approximately 50% of tissue located in the bone marrow cavities is fat.
Bone Marrow Components
- The normal ratio of myeloid to erythroid precursors in bone marrow (M:E ratio) is 3:1.
- Pluripotent hematopoietic stem cells are characteristic for their ability to differentiate into all types of blood cells, except for having a fixed receptor for a specific antigen, which is characteristic of lymphoid cells.
Test your knowledge on hematopoiesis with this quiz! Answer questions about the first type of cell produced by the developing embryo and the best areas for hematopoiesis in adults. Choose the best answer from the provided options and see how well you score!
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