Structure of Plasma Membrane
The structure of the plasma membrane is explained by the help of the fluid mosaic model. It shows plasma membrane is a dynamic structure that consists of the fluid-like lipid bilayer embedded with proteins in a mosaic manner. This arrangement ensures that the structure is flexible for the movement of substances through it and is capable of adapting to changing conditions. The movement of only the desired substances from the structure is called its nature of selective permeability. This nature and structure of the membrane is due to the presence of the following components;
- Lipid Bilayer: Phospholipid bi-layer (double layer) in which the hydrophobic tail is facing inward and the hydrophobic heads outward.
- Integral Proteins: Proteins that are embedded in the lipid bilayer and act as the transport channels, receptors, and enzymes.
- Peripheral Proteins: Proteins that are present in the membrane surface (inner or outer) that help in cell-to-cell signalling, and cell-to-cell interaction, and maintain the membrane structure.
- Cholesterol Molecules: Dispersed throughout the membrane help maintain the structural integrity and regulate the membrane’s movement.
- Glycoproteins and Glycolipids: Made up of carbohydrate chains attached with either proteins or lipids and act as recognition sites for other cells and the immune system.
Diagram of Plasma Membrane
The diagram of plasma membrane shows the visual representation of the structure of the plasma membrane. The plasma membrane or the cell membrane is a semi-permeable structure that maintains cell integrity and controls the passage of materials in and out of the cell. The diagram of plasma membrane class 9 and class 12 are often asked in the examinations.
The diagram of plasma membrane labeled is given below:
Diagram of Plasma Membrane
Table of Content
- Description of Plasma Membrane
- Structure of Plasma Membrane
- Functions of Plasma Membrane
- Conclusion – Diagram of Plasma Membrane
- FAQs – Diagram of Plasma Membrane