Biology › Section C · Cell structure and membranes › Topic C.3
The endomembrane system
A eukaryotic cell runs a postal service inside itself: membranes that fold, tag, package, and ship proteins and lipids to precise addresses. From the ribosome-studded rough ER through the Golgi's sorting floors to the lysosome's incinerator, this is the production line that keeps a cell supplied.
In this topic
- One team of membranes
- The endoplasmic reticulum: factory floor
- Rough ER: the protein bench
- Smooth ER: the chemistry lab
- The Golgi apparatus: sorting and shipping
- Lysosomes: the recycling plant
- Worked example: shipping one antibody
- Worked example: the macrophage and the bacterium
- When the system fails
- Common mistakes to avoid
- Key takeaways
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