Endoplasmic Reticulum

Tags

Cegep1

Biology

Word count

105 words

Reading time

1 minute

Membrane-bound organelle
Lit. network within cytoplasm
Abbr. ER
Part of the endomembrane system

Continuous with plasma membrane

Types

Smooth

Abbr. SER
Tubular shape
No ribosome

Functions:

• Lipid synthesis
• Carbohydrate metabolism
• Drug and poison detoxification
• $C{a}^{2+}$ storage (in muscle cells)

Rough

Abbr. RER
Cisternae shape
Has ribosomes on its surface

Functions:

• Membrane production for the endomembrane system (incl. itself)
• Synthesis of proteins destined for insertion into the plasma membrane or secretion (by ribosomes)
• Packages proteins into transport vesicles and sends them to the Golgi apparatus

Contributors

Ajitani Hifumi

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