Anatomy

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Author:
Anonymous
ID:
99438
Filename:
Anatomy
Updated:
2011-09-02 01:17:07
Tags:
Cells
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Description:
Anatomy
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  1. Membrane-Bound Ribosomes
    synthesize poteins destined either for incorporation into cell membranes or for export from the cell.
  2. Endoplasmic Reticulum
    • ("network within the cytoplasm")
    • Extensive system of interconnected tubes and parallel membranes enclosing fluid- filled cavities (cisternae)
  3. Rough Endoplasmic Reticulum
    • External surface is covered with ribosomes
    • Well developed in most secretory cells, antibody-producing plasma cells, and liver cells -> produce most blood proteins
    • The cell's "membrane factory" b/c integral proteins and phosholipids that form part of all cellular membranes are manufactured there.
  4. Smooth Endoplasmic Reticulum
    Consits of tubules arranged in a looping network
  5. Sarchoplasmic Reticulum
    important role in calcium ion storage and release during muscle contraction
  6. Golgi Apparatus
    • Consists of stacked and flattened membranous sacs
    • "traffic director"
    • Function: modify, concentrate, and package the proteins and lipids made at the rough ER
  7. Lysosomes
    • "disintegrator bodies"
    • Spherical membranous organelles containing acivated digestive enzymes
    • Can digest almost all kinds of biological molecules
    • Work best in acidic conditions &are caalled "acid hydrolases"

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