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Forms and Varieties of Blood Cells

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이 집합의 용어 (20)

  • What is the morphology of frog erythrocytes?
    Frog erythrocytes are oval-shaped, nucleated cells about 25 µm in diameter, with acidophilic cytoplasm stained pink by eosin and nuclei stained purple by hematoxylin.
  • How do mammalian erythrocytes differ from those of lower vertebrates?
    Mammalian erythrocytes are anucleated, biconcave disks about 7.2 µm in diameter, whereas lower vertebrates' erythrocytes retain their nuclei throughout life.
  • What staining method is used for frog blood smears?
    Hematoxylin and Eosin (H&E) staining is used, where cytoplasm stains pink and nuclei stain purple.
  • What staining method is used for human blood smears?
    May-Grunwald-Giemsa staining is used for human blood smears to differentiate cell types.
  • What are the two main types of leukocytes based on nuclear morphology?
    Leukocytes are divided into mononuclear cells (lymphocytes, monocytes) and polymorphonuclear cells (neutrophils, eosinophils, basophils).
  • Describe the nucleus of polymorphonuclear neutrophils.
    The nucleus is segmented into several lobes connected by strands, becoming more lobed as the cell ages.
  • What is the characteristic of lymphocyte nuclei?
    Lymphocytes have a large, spherical nucleus that almost completely occupies the cell, with condensed chromatin called heterochromatin.
  • How is the monocyte nucleus described?
    Monocytes have a large, bean-shaped or kidney-shaped nucleus.
  • What is the typical size and shape of mammalian erythrocytes?
    Mammalian erythrocytes are biconcave disks approximately 7.2 µm in diameter.
  • Why are erythrocyte cytoplasms acidophilic in frog blood smears?
    Because of their richness in hemoglobin, a basic protein, their cytoplasm stains pink with eosin.
  • What is the function of blood smears in cell study?
    Blood smears spread cells thinly on slides, allowing clear visualization of individual cells and their nuclei.
  • What is the significance of the biconcave shape of mammalian erythrocytes?
    The biconcave shape increases surface area for gas exchange and allows flexibility to pass through capillaries.
  • How do leukocytes differ from erythrocytes in staining and structure?
    Leukocytes have nuclei and stain differently depending on type, while erythrocytes in mammals lack nuclei and stain pink.
  • What is heterochromatin in lymphocytes?
    Heterochromatin is condensed chromatin appearing as coarse clumps in the lymphocyte nucleus.
  • What is the size comparison reference for other blood cells?
    Mammalian erythrocytes, being 7.2 µm in diameter, serve as a size reference for other blood cells.
  • What is the main difference between mononuclear and polymorphonuclear leukocytes?
    Mononuclear leukocytes have a single, unlobed nucleus; polymorphonuclear leukocytes have lobed or segmented nuclei.
  • What is the typical appearance of eosinophils in blood smears?
    Eosinophils are polymorphonuclear leukocytes with granules that stain intensely with eosin.
  • What is the role of May-Grunwald-Giemsa stain in blood cell identification?
    It differentiates blood cells by staining nuclei and cytoplasm distinctively, aiding identification of leukocyte types.
  • How does the nucleus of aging neutrophils change?
    The nucleus becomes more segmented and lobed as neutrophils age.
  • What is the significance of the kidney-shaped nucleus in monocytes?
    It helps identify monocytes as the largest leukocytes with a distinctive nucleus shape.