Plasma Membrane | Structure & Function | Fluid Mosaic Model | Fedral Board Biology | 2024

Описание к видео Plasma Membrane | Structure & Function | Fluid Mosaic Model | Fedral Board Biology | 2024

Plasma Membrane:

The plasma membrane, also known as the cell membrane, is a thin, semi-permeable membrane that surrounds the cell and regulates the movement of materials in and out. It is composed of:

1. Phospholipids (mainly phospholipid bilayer)
2. Proteins (integral and peripheral)
3. Carbohydrates (glycoproteins and glycolipids)
4. Cholesterol

Functions:

1. Separates the cell from its environment
2. Regulates the movement of materials (transport)
3. Maintains cell shape
4. Acts as a barrier
5. Cell signaling and communication

Fluid Mosaic Model:

The fluid mosaic model describes the structure of the plasma membrane as a fluid, dynamic, and flexible structure, where:

1. Phospholipids form a bilayer with their tails facing inward
2. Proteins are embedded or attached to the membrane
3. The membrane is semi-fluid, allowing movement of components

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