Biology / Unit 2 Bio 0289 short lesson, about 20 seconds
Rough Endoplasmic Reticulum
Captions available
The idea
The rough endoplasmic reticulum is a membrane network studded with ribosomes that modifies newly made proteins and synthesizes membrane phospholipids.
In practice
Liver cells, which secrete large amounts of protein, carry an especially dense rough endoplasmic reticulum.
Where people slip
The rough ER's ribosomes sit on its cytoplasmic surface — they are the same ribosomes described at Bio 0269, only positioned differently.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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