Which Organelles Have Cisternae

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which organelles have cisternae

Cisternae are flattened, membrane-bound sacs that are found in two organelles of eukaryotic cells the endoplasmic reticulum (ER) and the Golgi apparatus.

* Endoplasmic reticulum

The ER is a network of interconnected tubules and sacs that is found throughout the cytoplasm of the cell. It is responsible for the synthesis, modification, and transport of proteins and lipids. The ER has two main types rough ER and smooth ER. Rough ER is covered in ribosomes, which are responsible for protein synthesis. Smooth ER does not have ribosomes and is involved in the synthesis of lipids and other molecules.

The cisternae of the ER are interconnected and form a continuous network. They are the sites where proteins are synthesized, folded, and modified. The proteins are then transported to the Golgi apparatus for further processing.

* Golgi apparatus

The Golgi apparatus is a stack of flattened sacs that is located near the nucleus of the cell. It is responsible for the packaging and secretion of proteins and lipids. The Golgi apparatus has three main regions the cis face, the medial cisternae, and the trans face.

The cis face is the side of the Golgi apparatus that receives proteins and lipids from the ER. The medial cisternae are the middle region of the Golgi apparatus, where proteins and lipids are modified and sorted. The trans face is the side of the Golgi apparatus that releases proteins and lipids from the cell.

The cisternae of the Golgi apparatus are the sites where proteins and lipids are packaged into vesicles for transport to their final destinations.

In addition to the ER and Golgi apparatus, some other organelles may also have cisternae. For example, the sarcoplasmic reticulum, which is found in muscle cells, has cisternae that store calcium ions.

Cisternae are an important part of many cellular processes. They provide a surface area for the synthesis, modification, and transport of proteins and lipids. They also play a role in the packaging and secretion of these molecules.

I hope this post has helped you to understand which organelles have cisternae.