Did you know facts about endoplasmic reticulum?
Did you know facts about endoplasmic reticulum?
endoplasmic reticulum (ER) A system of membranes within the cytoplasm of plant and animal cells. It forms a link between the cell and nuclear membranes (see cisterna) and is the site of protein synthesis. It is also concerned with the transport of proteins and lipids within the cell.
Why is the endoplasmic reticulum the most important?
The ER has a central role in lipid and protein biosynthesis. Its membrane is the site of production of all the transmembrane proteins and lipids for most of the cell’s organelles, including the ER itself, the Golgi apparatus, lysosomes, endosomes, secretory vesicles, and the plasma membrane.
What is unique about the rough ER?
The rough ER is characterized by the presence of membrane-bound ribosomes that give it a distinctive appearance under the microscope. These ribosomes look like studs and distinguish the organelle from the smooth sections of the ER. Some proteins are also synthesized by strings of ribosomes, called polysomes.
Can you live without endoplasmic reticulum?
If the ER is absent, the skeletal muscle fibers would not be able to contract muscles. Consequently, in the absence of all these basic and essential cellular activities, the cells tend to die.
What are the 5 functions of endoplasmic reticulum?
The ER is the largest organelle in the cell and is a major site of protein synthesis and transport, protein folding, lipid and steroid synthesis, carbohydrate metabolism and calcium storage [1–7].
Who discovered endoplasmic reticulum?
ER discovered by Emilio Veratti in the year of 1902 as Sarcoplasmic Reticulum in muscle fibers which is similar to ER in other cells (Veratti, 1961). Fifty years later, this new organelle was first visualized through electron microscopy (EM) by Keith Porter and termed it as “endoplasmic reticulum” (Porter, 1953).
What is the ER made of?
The ER consists of the nuclear envelope and the peripheral ER, which includes smooth tubules and rough sheets. While the ER is defined as an interconnected network with a continuous membrane, the different structures that make up the ER perform very diverse and specialized functions within the cell.
What is endoplasmic reticulum made of?
The ER is composed of a continuous membrane system that includes the nuclear envelope (NE) and the peripheral ER, defined by flat sheets and branched tubules (Fig. 1).
What happens if the endoplasmic reticulum stopped working?
Explanation: The cell would no longer be able to produce ribosomes which are needed to make proteins. The cell would no longer be able to produce proteins.
Who discovered ER?
What will happen if the endoplasmic reticulum stopped working?