Final answer:
The fluid mosaic model describes the structure and function of the cell membrane, including its phospholipid bilayer, embedded proteins, and selective permeability.
Step-by-step explanation:
The fluid mosaic model describes the structure of the cell membrane. According to this model, the cell membrane is composed of a phospholipid bilayer with embedded proteins. The phospholipids have a polar head and nonpolar tails, which gives the membrane its fluidity and allows it to easily move and change shape. The proteins within the membrane can have various functions, such as serving as transport channels or receptors.
The fluid mosaic model also explains the selective permeability of the cell membrane. It means that the membrane is selectively permeable, allowing certain substances to pass through while preventing others from crossing. This is essential for maintaining the cell's internal environment and regulating what enters and exits the cell.
Although cholesterol is present in the cell membrane, it is not a defining characteristic of the fluid mosaic model. Cholesterol helps stabilize the membrane and regulate its fluidity, but it is not mentioned in the description of the model itself.
Learn more about Cell membrane structure and function