The endoplasmic reticulum (er) is an important organelle in eukaryotic cells it plays a major role in the production, processing, and transport of proteins and lipids. The endoplasmic reticulum can be continuous in places with the membrane of the cell nucleus the function of the endoplasmic reticulum can vary greatly with cell type, and even within the same cell it can have different functions depending on whether it is rough or smooth ♦ the rough endoplasmic reticulum is a series of connected flattened sacs that have many ribosomes on their outer surface. Endoplasmic reticulum (er), in biology, a continuous membrane system that forms a series of flattened sacs within the cytoplasm of eukaryotic cells and serves multiple functions, being important particularly in the synthesis, folding, modification, and transport of proteins.
Smooth endoplasmic reticulum is the site of the breakdown of toxins and carcinogens in the liver, the conversion of cholesterol into steroids in the gonads and adrenal glands, and the release of calcium ions in the muscles, causing muscle contraction. Endoplasmic reticulum n a membrane network within the cytoplasm of cells involved in the synthesis, modification, and transport of cellular materials endoplasmic reticulum n (biology) an extensive intracellular membrane system whose functions include synthesis and transport of lipids and, in regions where ribosomes are attached, of proteins endoplas. Endoplasmic reticulum definition is - a system of interconnected vesicular and lamellar cytoplasmic membranes that functions especially in the transport of materials within the cell and that is studded with ribosomes in some places.
The endoplasmic reticulum is the site of biosynthesis of many cellular components many membrane components are synthesized on the endoplasmic reticulum, including membrane proteins and membrane lipids the endoplasmic reticulum is subdivided into rough and smooth endoplasmic reticulum. The endoplasmic reticulum (er) is an important organelle in eukaryotic cells it plays a major role in the production, processing, and transport of proteins and lipids the er produces transmembrane proteins and lipids for its membrane and for many other cell components including lysosomes , secretory vesicles, the golgi appatatus , the cell membrane , and plant cell vacuoles.
The endoplasmic reticulum is a network of sacs that manufactures, processes, and transports chemical compounds for use inside and outside of the cell it is connected to the double-layered nuclear envelope, providing a pipeline between the nucleus and the cytoplasm. The endoplasmic reticulum (er) is a type of organelle found in eukaryotic cells that forms an interconnected network of flattened, membrane-enclosed sacs or tube-like structures known as cisternaethe membranes of the er are continuous with the outer nuclear membranethe endoplasmic reticulum occurs in most types of eukaryotic cells, but is absent from red blood cells and spermatozoa.
All eucaryotic cells have an endoplasmic reticulum (er) its membrane typically constitutes more than half of the total membrane of an average animal cell (see table 12-2 ) the er is organized into a netlike labyrinth of branching tubules and flattened sacs extending throughout the cytosol ( figure 12-35 . The endoplasmic reticulum is a network of tubules and flattened sacs that serve a variety of functions in plant and animal cells there are two regions of the er that differ in both structure and function.