Quelle est la fonction du reticulum endoplasmique?

Quelle est la fonction du réticulum endoplasmique?

Le réticulum endoplasmique est le compartiment de la cellule où se déroule la fabrication des protéines et des lipides. Dans la cellule musculaire, il joue en plus un rôle essentiel lors de la contraction musculaire en libérant et en recaptant le calcium qu’il contient.

Quelle est la taille du réticulum endoplasmique?

90 nm
Celle-ci est continue avec le réticulum endoplasmique. Le contenu du noyau communique avec le cytosol via des pores nucléaires (d’un diamètre de 90 nm). Des structures protéiques trés complexes sont associées aux pores.

Quel est la structure du réticulum endoplasmique?

Structure. Le réticulum endoplasmique est constitué d’un réseau membraneux étendu. La membrane sépare la lumière du réticulum du cytosol. Des parties de la membrane du réticulum sont en continuité avec la membrane externe du noyau, et la lumière du RE est en continuité avec l’espace intermembranaire du noyau.

What is the importance of endoplasmic reticulum?

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 . All eukaryotic cells contain an endoplasmic reticulum (ER).

What is the job of smooth endoplasmic reticulum?

The duties of the smooth endoplasmic reticulum vary depending on the type of cell, but one of the most important functions of this cellular structure is the synthesis of phospholipids and cholesterol.

What is an example of endoplasmic reticulum?

The endoplasmic reticulum is defined as a series of folded membranes in the cells which are associated with protein synthesis, storage and the movement of cellular materials. An example of the endoplasmic reticulum is the place that steroids are stored in the cells for later use.

What is the function of the endoplasmic reticulum in plants?

The general functions of the endoplasmic reticulum in plant cell are protein synthesis and maturation. Endoplasmic reticulum of plant cell possesses some additional functions, which is not found in animal cells.

Quels sont les deux types de réticulum endoplasmique?

Le réticulum endoplasmique peut être : granuleux (REG), c’est-à-dire associé à des ribosomes qui constituent les « granules » ; ou lisse (REL).

What are 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.

What is endoplasmic reticulum best described as?

a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane. It usually has ribosomes attached and is involved in protein and lipid synthesis.

What is the job of endoplasmic reticulum?

Endoplasmic reticulum has a number of jobs within the cell. This includes the folding and transport of various proteins, specifically carrying them to the Golgi apparatus. Someother proteins, mostly the glycoproteins, move across the ER’s membrane.

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 . All eukaryotic cells contain an endoplasmic reticulum (ER).