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Questions and Answers
Which cell type is characterized by the presence of prominent azurophilic granules rich in myeloperoxidase?
In which cell type does the nucleus appear more condensed than in a myeloblast, with visible nucleoli?
Which cell type has a nucleus that begins to assume an indented or kidneys-bean shape?
Which cell type has a uniformly pink cytoplasm with evenly distributed pinkish-purple secondary granules and no nucleoli?
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At what percentage of bone marrow might you expect to find a band with distinct lobes connected by chromatin strands?
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What is the main consideration for identifying cells according to the text?
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Which physical attribute is NOT used for identifying myeloblasts?
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What is the main difference in physical attributes between myeloblasts and promyelocytes?
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In the identification of very immature cells on a peripheral smear using light microscopy, what is the recommended approach according to the text?
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Which attribute is NOT mentioned as a consideration for identifying very immature cells on a peripheral smear?
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What feature distinguishes promyelocytes from myeloblasts based on their physical attributes?
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Study Notes
Cell Types and Characteristics
- Promyelocytes are characterized by the presence of prominent azurophilic granules rich in myeloperoxidase.
- Myelocytes have a nucleus that appears more condensed than in a myeloblast, with visible nucleoli.
- Metamyelocytes have a nucleus that begins to assume an indented or kidney-bean shape.
- Segmented neutrophils have a uniformly pink cytoplasm with evenly distributed pinkish-purple secondary granules and no nucleoli.
Bone Marrow Composition
- Band cells with distinct lobes connected by chromatin strands are typically found at a percentage of 10-20% in bone marrow.
Cell Identification
- The main consideration for identifying cells is the presence or absence of nucleoli and the shape of the nucleus.
- Nuclear chromatin pattern is NOT used for identifying myeloblasts.
- The main difference in physical attributes between myeloblasts and promyelocytes is the presence of azurophilic granules in promyelocytes.
- To identify very immature cells on a peripheral smear using light microscopy, it is recommended to look for cells with a high nuclear-to-cytoplasmic ratio.
- The presence or absence of a Golgi apparatus is NOT mentioned as a consideration for identifying very immature cells on a peripheral smear.
- The presence of azurophilic granules distinguishes promyelocytes from myeloblasts based on their physical attributes.
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Description
Test your knowledge of leukopoiesis and leukocytes identification criteria with this quiz. The quiz covers the function, site of origin, and physical attributes of phagocytes, immunocytes, lymphocytes, and granulocytes, as well as the careful observation criteria for cell identification.
