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The Rough Endoplasmic Reticulum- Cytoplasmic ribosomes bound to the Rough ______ synthesize membrane and organelle proteins and virtually all proteins to be secreted from the cell
ER
It also serves as an intracellular Ca2+ store that is used in many cell signaling responses
reticulum
The ER membrane is the site at which most of the lipids for mitochondrial and peroxisomal membranes are made
Smooth
Almost all of the ______ that will be secreted to the cell exterior—plus those destined for the lumen of the ER, Golgi apparatus, or lysosomes—are initially delivered to the ER lumen
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The Golgi apparatus, lysosomes, endosomes, secretory vesicles, and the plasma membrane
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Study Notes
Rough Endoplasmic Reticulum
- Cytoplasmic ribosomes bound to the Rough Endoplasmic Reticulum synthesize membrane and organelle proteins and virtually all proteins to be secreted from the cell.
- The Rough Endoplasmic Reticulum serves as an intracellular Ca2+ store used in many cell signaling responses.
- The ER membrane is the site where most lipids for mitochondrial and peroxisomal membranes are synthesized.
- Almost all proteins destined for secretion to the cell exterior, plus those for the ER lumen, Golgi apparatus, or lysosomes, are initially delivered to the ER lumen.
- The proteins are then transported to other organelles such as the Golgi apparatus, lysosomes, endosomes, secretory vesicles, and the plasma membrane.
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Description
Test your knowledge of the endoplasmic reticulum with this quiz. Explore its key functions in lipid and protein synthesis, as well as its role as an intracellular calcium store. Dive into the importance of the ER membrane in producing transmembrane proteins and lipids for various organelles within the cell.
