What is the smooth endoplasmic reticulum made of?
The smooth endoplasmic reticulum is primarily composed of three-dimensional polygonal networks of tubules called cisternae. They are about 50 nm in diameter in mammals and 30 nm in diameter in yeast.
What are the characteristics of smooth endoplasmic reticulum?
Smooth endoplasmic reticulum (sER) is (a part of) endoplasmic reticulum that is tubular in form and lacks ribosomes. It is present in eukaryotic cells and is associated with lipid synthesis, carbohydrate metabolism, regulation of calcium concentration, and drug detoxification.
What is the main function of the smooth ER?
The smooth ER is involved in the synthesis of lipids, including cholesterol and phospholipids, which are used in the production of new cellular membrane. In certain cell types, smooth ER plays an important role in the synthesis of steroid hormones from cholesterol.
What is the structural difference between rough ER and smooth ER?
The most basic difference between RER and SER is the presence of ribosomes. When ribosomes attach to the surface of an ER, it gives a characteristic rough appearance; hence it is called Rough ER. On the other hand, a smooth ER does not have ribosomes on its surface. It possesses ribosomes attached to its membrane.
What is the structure and function of endoplasmic reticulum?
The endoplasmic reticulum (ER) is a large, dynamic structure that serves many roles in the cell including calcium storage, protein synthesis and lipid metabolism. The diverse functions of the ER are performed by distinct domains; consisting of tubules, sheets and the nuclear envelope.
What is the function of Ser?
SER is involved in the synthesis of lipids, including cholesterol and phospholipids, which are used in the production of new cellular membrane. In cells of the liver, SER contributes to the detoxification of drugs and harmful chemicals.
What is the function of the SER?
Answer: The endoplasmic reticulum (ER) is a network of membranes that is present inside eukaryotic cells. These structures are responsible for the production and transportation of proteins, fats and other essential molecules required for the functioning of a cell.
What kind of structure is the endoplasmic reticulum?
The endoplasmic reticulum is the largest single structure in eukaryotic cells. It consists of a range of interconnected shapes, including sheets and tubules, and comprises a lumen enclosed by a membrane that is continuous with the membrane that surrounds the nucleus of the cell (Figure 1).
What is the structural difference between rough endoplasmic reticulum ER and smooth ER?
What is the structural difference between rough endoplasmic reticulum and smooth ER quizlet?
What is the difference between rough endoplasmic reticulum and smooth endoplasmic reticulum? Rough endoplasmic reticulum is covered in ribosomes and is involved in the synthesis and production of proteins. Smooth endoplasmic reticulum has no ribosomes and is involved in the production of enzymes and lipids.
What is the difference between smooth and rough endoplasmic reticulum?
Does the smooth ER make proteins?
The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function.
What is the structural difference between smooth and rough endoplasmic reticulum?
Smooth Endoplasmic Reticulum does not have ribosomes on its membrane. Rough Endoplasmic Reticulum possesses ribosomes attached to its membrane. It is organized of vesicles and tubules.
How do rough and smooth ER compare structurally and functionally quizlet?
Both rough and smooth parts are comprised of membranes that form tubes and sacs. On the cytoplasmic side of the rough ER there are many ribosomes (not permanently attached). Smooth ER is more tubular (less sacs) and there are no ribosomes on its outer side.
What are the differences in structure between rough and smooth endoplasmic reticulum?
Smooth ER is derived from rough endoplasmic reticulum by sacrificing the ribosomes, whereas Rough ER originates from the nuclear membrane. The main difference between the SER and RER is the presence of ribosomes, as SER does not consist of ribosomes but RER consists of ribosomes.
What is the important structural difference between rough endoplasmic reticulum ER and smooth ER?
What is the structural difference between rough endoplasmic reticulum and smooth ER?
What does the smooth entoplasmic reticulum do?
The smooth endoplasmic reticulum lacks ribosomes, so it appears more tubular and less bumpy under a microscope. Its job, much like that of the rough endoplasmic reticulum, is to manufacture and package molecules, but the smooth endoplasmic reticulum also makes lipids and some steroid hormones, and in some types of cells it metabolizes some sugars that attach to the outside of it.
Are steroids synthesised in smooth endoplasmic reticulum?
The smooth endoplasmic reticulum is unrelated to ribosomes and plays a different role. The smooth ER helps in the synthesis of lipids like phospholipids and cholesterol, which are needed for producing new membranes of cells. In some cell types, Smooth ER is involved in the production of steroid hormones from cholesterol.
What does endoplasmic reticulum stand for?
The endoplasmic reticulum (ER) is an organelle found within eukaryotic cells that is responsible for the transport, processing, and production of lipids and proteins. The endoplasmic reticulum produces both lipids and proteins for the membrane of the cell. These lipids and proteins are also used to compose other parts of the cell such as vacuoles, the cell membrane, the Golgi apparatus, lysosomes, and secretory vesicles.
What does rough endoplasmic reticulum compared to?
Rough ER contains attached ribosomes while smooth ER does not. Via the attached ribosomes, rough endoplasmic reticulum synthesizes proteins via the translation process. Rough ER also manufactures membranes. Smooth endoplasmic reticulum serves as a transitional area for transport vesicles.