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The endoplasmic reticulum (ER) is a part of a transportation system of the eukaryotic cell, and has many other important functions such as protein folding. It is a type of organelle made up of two subunits – rough endoplasmic reticulum ( RER ), and smooth endoplasmic reticulum ( SER ).
Endoplasmic reticulum: outer part of the nuclear envelope forming a continuous channel used for transportation; consists of the rough endoplasmic reticulum and the smooth endoplasmic reticulum Rough endoplasmic reticulum (RER): considered "rough" due to the ribosomes attached to the channeling; made up of cisternae that allow for protein production
There are two distinct, though connected, regions of ER that differ in structure and function: smooth ER and rough ER. The rough endoplasmic reticulum is so named because the cytoplasmic surface is covered with ribosomes, giving it a bumpy appearance when viewed through an electron microscope. The smooth ER appears smooth since its cytoplasmic ...
English: This is a diagram of an animal cell. I based my information on these diagrams: ... Rough endoplasmic reticulum Smooth endoplasmic reticulum ≅ smooth ...
However, this unique space has several morphologically distinct areas. [3] Thus, the peripheral ER is composed of a polygonal network of tubules and interdispersed sheets that spreads from the nuclear envelope to the cell cortex. At an ultrastructural level, the ER can be classified into two types, rough ER (RER) and smooth ER (SER).
Components of a typical animal cell: Nucleolus; Nucleus; Ribosome (dots as part of 5) Vesicle; Rough endoplasmic reticulum; Golgi apparatus (or, Golgi body) Cytoskeleton; Smooth endoplasmic reticulum; Mitochondrion; Vacuole; Cytosol (fluid that contains organelles; with which, comprises cytoplasm) Lysosome; Centrosome; Cell membrane
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The ER has two forms: the rough ER, which has ribosomes on its surface that secrete proteins into the ER, and the smooth ER, which lacks ribosomes. [2] The smooth ER plays a role in calcium sequestration and release and also helps in synthesis of lipid.
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