sgu vet histo 1 set 3

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onaktan
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6282
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sgu vet histo 1 set 3
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2010-02-07 18:19:02
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sgu vet histo1 set3
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cytoplasmic inclusions, intercellular junctions, specializations of free cell surface
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  1. what are the types of cytoplasmic inclusions (5)
    • glycogen
    • lipid
    • melanin
    • hemosiderin
    • lipofuscin
  2. what is stored food or stored material called in a cell
    cytoplasmic inclusions
  3. glycogen, lipid, melanin, hemosiderin, and lipofuscin make up what in the cell
    cytoplasmic inclusions: stored food/material
  4. what is in liver and muscle cells tha can be demonstrated by PAS reaction
    glycogen
  5. what cells is glycogen found in (2)
    • liver cells
    • muscle cells
  6. how can glycogen be demonstrated
    PAS reaction
  7. what is in adipose cells that can be demonstrated with osmic acid fixation
    lipid
  8. what cells are lipids found
    adipose cells
  9. what do use to demonstrate lipids
    osmic acid fixation
  10. where is melanin found (2)
    • skin
    • pigment epithelium of the retina
  11. what cytoplasmic inclusion is found in skin and pigment epithelium of the retina
    melanin
  12. what is a result of hemoglobin degradation
    hemosiderin
  13. what is hemosiderin a result of
    hemoglobin degradation
  14. what is the indigestible residue of phagocytosis, commonly found in cardiac muslce, liver and nerve cells
    lipofuscin
  15. what pigment increases with age
    lipofucin
  16. where is lipofuscin commonly found (3)
    • cardiac muscle
    • liver
    • nerve cells
  17. what is the indigestible part of phagocytosis
    lipofucin
  18. what is lipofucin composed of
    the indigestible part after phagocytosis
  19. what are the different types of intercellular junctions (3 main, 3 sub)
    • tight junction
    • adhering (anchoring) junctions
    • ->zonula adherens
    • ->desmosomes or macula adherens
    • ->hemidesmosomes
    • communication (gap) junction
  20. where are tight junctions found
    inbetween epithelial cells
  21. what type of junction is found inbetween epithelial cells
    tight junctions
  22. what is the structure of tight junctions
    • irregularly anastamosing ridges of transmembrane protein
    • (anastamosing = vein like network)
  23. what has an anstamosing ridge of transmembrane protein struture
    tight junctions
  24. what is the function of tight junctions
    a barrier to prevent passage of water soluble molecules from the lumen to intercellular space and vice versa and can sometimes be selectively permeable
  25. what has the function of being a barrier to prevent passage of water soluble moeclues fromt he lumen to the intercellular space and vice bersa
    tight junctions
  26. what seals neighbouring cells together in a beltlike fashion
    tight junctions
  27. what cells and organ do you see tight junctions (2)
    • epithelial cells
    • GI tract
  28. what can be found in between epithelial cells in the GI tract
    tight junctions
  29. what are the irregularly anastamosing ridges made of in tight junctions
    transmembrane protein
  30. what is made with transmembrane protein that's irregularly anastamosing ridges between cells
    tight junctions
  31. what are the 3 types of adhering or anchoring junctions (3)
    • zonula adherens
    • desmosomes or macula adherens
    • hemidesmosomes
  32. what holds together cells by a transmembrane protein linker and a bundle of actin filaments running parallel to the junctional cell membrane
    zonula adherens
  33. what type of adherens are prominent in the lining cells of the intestine
    zonula adherens
  34. how do zonula adherens hold cells together
    by transmembrane protein linker and a bundle of actin filaments run parallel to the junctional cell membrane
  35. where are zonula adherens prominent in
    the lining cells of the intestine
  36. what is a transmembrane protein linker plus intercellular electron-dense plaque called
    desmosomes or macula adherens
  37. what do intermediate filaments attach to to form a hairpin loop on a intercellular electron-dense plaque
    desmosomes or macula adherens
  38. what is a macula adherens
    another name for desmosomes
  39. what are the components of zonula adherens (2)
    • transmembrane protein
    • actin filaments
  40. what are the components of macula or desmosomes adherens (3)
    • transmembrane protein
    • electron-dense plaque
    • intermediate filaments
  41. hemidesmosomes connect what to what (2)
    • cells
    • basement membrane
  42. what type adherance connect a cell to the basement membrane
    hemidesmosomes
  43. what permit the direct passage of inorganic ions and other water-soluble molecules from cell to cell
    gap junctions (communicating junction)
  44. what is a gap junctions function in a cell
    permits the direct passage of inorganic ions and other water-soluble molecules from cell to cell
  45. what has the intercellular space bridged by interlocking transmembrane proteins from cell to cell
    gap junctions
  46. what is the structure of gap junctions
    interlocking transmembrane proteins between cells
  47. what has considerable functional importance
    gap junctions
  48. what are the key differences between a desmosome and a hemidesmosomes (2)
    • desmosome connects cell to cell and have 2 electron dense plaque
    • hemidesmosome connects cell to basement membrane and has only 1 electron dense plaque
  49. what are the 2 layers of the basement membrane that a hemidesmosome connects to (2)
    • basal lamina
    • reticular lamina
    • both together make up the basement membrane
  50. what are the 4 types of specializations of the free cell surface (4)
    • cilia
    • flagellum
    • microvilli
    • stereocilia
  51. where are cilia found (2)
    • respiratory
    • male/female repro systems (movement of mucus or spermatozoa or oocytes)
  52. what type of specialized free cell surface does the respiratory system have
    cilia
  53. what is surrounded by plasma membrane and is composed of 9 doublet microtubules around 2 central microtubules
    cilia
  54. what is the components of a cilia (2)
    • surrounded by plasma membrane
    • 9 doublet microtubules around 2 central ones.
  55. where is the basal body located in a ciliated cell
    at the base resembling centrioles
  56. what are the key differences between cilia/flagellum and microvilli/stereocilia (2)
    • cilia/flagellum are motile and microvilli/stereocilia are not
    • cilia/flagellum have microtubules while microvilli/stereocilia do not
  57. what is a flagellum
    a single long cilium
  58. what is a single long cilium
    flagellum
  59. where is an example of a flagellum
    spermatozoon
  60. a sperm's tail is an example of what
    flagellum
  61. what are cytoplasmic evaginations to increase the free surface for absorption
    microvilli
  62. what is the structure of microvilli
    cytoplasmic evagination
  63. what is the function of microvilli
    increase the free surface area for absorption
  64. where can you find microvilli
    small intestine
  65. what is another name for microvilli
    brush border
  66. what is a brush border
    microvilli
  67. what type of specialized free cell surface feature is found in the small intestine
    microvilli
  68. what are long rigid microvilli
    stereocilia
  69. what is the structure of stereocilia
    long rigid version of microvilli
  70. where are stereocilia found
    hair cells of the spiral organ (corti) of the inner ear
  71. what specialized free cell surface are found in the inner ear
    stereocilia

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