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Endoplasmic Reticulum, Golgi Complexes and Secretory Vesicles

  • Robert A. Reid
  • Rachel M. Leech
Part of the Tertiary Level Biology book series (TLB)

Abstract

During the 1950s an avalanche of electron microscopic (E.M.) studies showed that the cytoplasm of most plant and animal cells contained a complex membrane system of canaliculi and cisternae. This was named the endoplasmic reticulum (ER) by Palade and was divided into rough ER, characterized by ribosomes on the outer surfaces of the cisternae, and smooth ER, which was devoid of ribosomes (figure 6.1). The rough ER was 40-50 nm wide, approximately half the width of the smooth ER elements. A third membrane system, known as the Golgi body or apparatus, since it was first reported by Golgi in 1898, was confirmed by E.M. and shown to be a relatively discrete interconnected fretwork of flattened sacs (saccules), tubules and vesicles that could fairly be termed an organelle. The finding that ER and Golgi bodies were particularly well developed in synthetically active cells like exocrine pancreas, liver, collagen-secreting fibroblasts and polymer-secreting plant cells, suggested that they were involved in synthetic and secretory activity. Subsequent investigations brilliantly vindicated these predictions.

Keywords

Endoplasmic Reticulum Rough Endoplasmic Reticulum GOLGI Complex Secretory Vesicle Endoplasmic Reticulum Membrane 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Bibliography

Further Reading

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Literature Cited

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Copyright information

© R. A. Reid and R. M. Leech 1980

Authors and Affiliations

  • Robert A. Reid
    • 1
  • Rachel M. Leech
    • 1
  1. 1.Department of BiologyUniversity of YorkEngland

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