ER

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  • Endoplasmic Reticulum
    • RER
      • Have ribosomes attached to them
        • Where protein synthesis takes place
          • Happens on the ribosomes attached to the RER
            • Collect in the cisternae when made
              • Then transported to eg) the Golgi Apparatus
    • SER
      • Different roles in cells
        • In ovary and testis it is the site of production of steroid hormones
          • EG. oestrogen and testosterone
        • In the liver cells it is the place where toxins are broken down and made harmless
      • Involved in lipid synthesis
  • The enclosed spaces formed by the membranes
    • Cisternae

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