The biomembrane system includes: cell membrane, cell nuclear membrane and various organelle membranes. There are direct or indirect connections in the structure of various biomembranes in cells. The endoplasmic reticulum membrane is connected with the outer nuclear membrane, and the endoplasmic reticulum cavity is connected with the cavity between the inner and outer nuclear membranes. A large number of ribosomes are attached to the outer nuclear membrane. (The content of the article is from the network for reference only)
Which three kinds of membranes are included in the biofilm system
The biomembrane system consists of cell membrane, cell nuclear membrane, endoplasmic reticulum, Golgi apparatus, mitochondria and other membranes surrounded by organelles. The composition and structure of these biomembranes are very similar, and they are closely linked in structure and function, which further reflects the coordination between various structures in cells.
Efficacy of biofilm system
1. Basic efficacy. Cytoplasm not only makes somatic cells have a relatively stable extracellular fluid, but also plays a fundamental role in the whole process of material transport, kinetic energy exchange and information transmission between somatic cells and the external natural environment.
2. Many key chemical changes of somatic cells are carried out in the extracellular matrix or on the surface of the membrane. The broad total membrane area in somatic cells shows many adhesion domains for enzymes, which creates resource advantages for the smooth development of various chemical changes.
3. The extracellular matrix in the somatic cells separates the somatic cells into small compartments, such as various cell structures, so that a variety of chemical changes can be carried out in the somatic cells without easy interaction, ensuring that the life activities of the somatic cells are carried out efficiently and orderly.
Role of biofilm system
(1) Separate and form cells and organelles, provide relatively stable internal environment for cell life activities, greatly increase the area of the membrane, and improve the biological function occurring on the membrane
(2) As a barrier, water-soluble substances on both sides of the membrane cannot pass through freely
(3) Selective material transport, accompanied by energy transfer
(4) Biological functions: hormone action, enzymatic reaction, cell recognition, electron transmission, etc
(5) Identification and transmission of information
(6) Material transport function: the material exchange between cells and the surrounding environment is the main transport realized by the brick movement function of cell membrane
Functions of biofilm system
First, the cell membrane not only makes the cell have a relatively stable internal environment, but also plays an important role in the process of material transport, energy conversion and information transmission between the cell and the external environment.
Second, many important biochemical reactions are carried out on the biofilm. These biochemical reactions require the participation of enzymes. The broad membrane area provides a large number of attachment sites for a variety of enzymes.
Third, the biological membrane in the cell separates various organelles, like a small compartment, so that multiple chemical reactions can be carried out in the cell at the same time without mutual interference, ensuring the efficient and orderly progress of cell life activities.
