draw and briefly explain the structure of golgi apparatus
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Golgi apparatus occurs in the form of granules,rods which is originated from endoplasmic reticulum.they r very small vesicles of different shapes,and r generally located near the nucleus. the golgi complex consists of many small groups of hollow tubular structure with membranous walls and us associated with some minute vesicles and vacuoles.it is concerned with the secretion of the cell including enzymes,horomones,etc.
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The Golgi apparatus is an organelle present in all eukaryotic cells. It belongs to the endomembrane system. It consists of about 80 dictyosomes (depending on the type of cell), and these dictyosomes are composed of 40 or 60 flat (cisterns) saccules surrounded by membrane that are stacked on top of each other, and whose function is to complete the manufacture of some proteins It functions as a packing plant, modifying vesicles of the rough endoplasmic reticulum. The new material of the membranes is formed in several tanks of the Golgi apparatus. Among the functions of the Golgi apparatus are protein glycosylation, selection, destination, lipid glycosylation, storage and distribution of lysosomes, as well as peroxisomes, which are secretion vesicles of substances.
The Golgi apparatus is composed of structures called saccules. These are grouped in a variable number, usually from 4 to 8, forming the dictyosome in the plants. They have tubular connections that allow the passage of substances between the cisterns. The saccules are flattened and curved, with their convex (external) face oriented toward the endoplasmic reticulum.2 Usually between 4 and 8 are observed, but more than 60 dictyosomes have been observed.3 Around the main cistern are disposed spherical vesicles freshly exociated. The Golgi apparatus can be divided into three functional regions:
Cis-Golgi region: it is the innermost and closest to the reticle. From it he receives the transition vesicles, which are saccules with proteins that have been synthesized in the membrane of the rough endoplasmic reticulum (RER), introduced into their cavities and transported by the lumen to the outermost part of the reticulum. These transition vesicles are the vehicle of said proteins that will be transported to the external face of the Golgi apparatus.
Medial region: it is a transition zone.
Trans-Golgi region: is the one that is closest to the plasma membrane. In fact, their membranes, both unitary, have a similar composition.
The vesicles from the endoplasmic reticulum fuse with the cis-Golgi, crossing all the dictyosomes to the trans-Golgi, where they are packaged and sent to the place that corresponds to them. Each region contains different enzymes that selectively modify the vesicles depending on where they are intended. However, it has not yet been possible to determine in detail all the functions and structures of the Golgi apparatus.
The Golgi apparatus is composed of structures called saccules. These are grouped in a variable number, usually from 4 to 8, forming the dictyosome in the plants. They have tubular connections that allow the passage of substances between the cisterns. The saccules are flattened and curved, with their convex (external) face oriented toward the endoplasmic reticulum.2 Usually between 4 and 8 are observed, but more than 60 dictyosomes have been observed.3 Around the main cistern are disposed spherical vesicles freshly exociated. The Golgi apparatus can be divided into three functional regions:
Cis-Golgi region: it is the innermost and closest to the reticle. From it he receives the transition vesicles, which are saccules with proteins that have been synthesized in the membrane of the rough endoplasmic reticulum (RER), introduced into their cavities and transported by the lumen to the outermost part of the reticulum. These transition vesicles are the vehicle of said proteins that will be transported to the external face of the Golgi apparatus.
Medial region: it is a transition zone.
Trans-Golgi region: is the one that is closest to the plasma membrane. In fact, their membranes, both unitary, have a similar composition.
The vesicles from the endoplasmic reticulum fuse with the cis-Golgi, crossing all the dictyosomes to the trans-Golgi, where they are packaged and sent to the place that corresponds to them. Each region contains different enzymes that selectively modify the vesicles depending on where they are intended. However, it has not yet been possible to determine in detail all the functions and structures of the Golgi apparatus.
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