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anat question

Discussion in 'NBDE Exams & Licensure Exams' started by incisorgirl, May 1, 2007.

  1. incisorgirl

    incisorgirl Junior Member

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    procollagen is formed at which level
    -ER
    -GOLGI

    decks says ER and in kaplan its GOLGI
     
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  3. foreigndentist

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    is formed at ER level esp. RER
     
  4. asdf84

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    ans is golgi.
     
  5. foreigndentist

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    1. Three peptide chains are formed (2 alpha-1 and 1 alpha-2 chain) in ribosomes along the Rough Endoplasmic Reticulum (RER). These peptide chains (known as preprocollagen) have registration peptides on each end; and a signal peptide is also attached to each
    2. Peptide chains are sent into the lumen of the RER
    3. Signal Peptides are cleaved inside the RER and the chains are now known as procollagen
    4. Hydroxylation of lysine and proline amino acids occurs inside the lumen. This process is dependent on Ascorbic Acid (Vitamin C) as a cofactor
    5. Glycosylation of specific hydroxylated amino acid occurs
    6. Triple helical structure is formed inside the RER
    7. Procollagen is shipped to the golgi apparatus, where it is packaged and secreted by exocytosis
     
  6. incisorgirl

    incisorgirl Junior Member

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    thank u so much
    one more question
    in salivary glands,secretory granules are exocytosed from the apical cytoplasm,under
    -sympathetic influence
    -parasympathetic influence














     
  7. aphistis

    Moderator Emeritus

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    Salivation is parasympathetically mediated.
     
  8. incisorgirl

    incisorgirl Junior Member

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    in salivary glands
    lining of intercalated duct--simple cuboidal or simple columnar
    and of excretory duct is-stratified columnar or stratified squamous

    apical cytoplasm of secretory end piece(in sal. glands) has abundant
    -mitochondria
    -RER
    -GOLGI

    in cell membranes,location of choline and amine containig phospholipids ?
     
  9. drli

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    in cell membranes,location of choline and amine containig phospholipids ?[/quote]

    choline containig phospholipids are enriched in outer leaflet of the lipid bilayer


    amine containig phospholipids are found mainly in inner leaflet
     

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