Question

Клеточная мембрана образована...​

Answer 1

Объяснение:

Клеточная мембрана представляет собой двойной слой (бислой) молекул класса липидов, большинство из которых представляет собой так называемые сложные липиды — фосфолипиды.

Answer 2

Structure of the Cell Membrane

The cell membrane, also known as the plasma membrane, is a crucial structure that separates the interior of the cell from the external environment. It is primarily composed of lipids and proteins.

The lipid bilayer forms the basic structure of the cell membrane. It consists of two layers of phospholipids, with their hydrophilic (water-attracting) heads facing outward and their hydrophobic (water-repelling) tails facing inward.

Composition of the Cell Membrane

The cell membrane is primarily composed of phospholipids, cholesterol, and proteins.

1. Phospholipids: These are the most abundant molecules in the cell membrane. They form a lipid bilayer, with the hydrophilic heads facing the aqueous environment and the hydrophobic tails facing each other.

2. Cholesterol: Cholesterol molecules are interspersed within the lipid bilayer. They provide stability to the membrane and regulate its fluidity.

3. Proteins: The cell membrane contains various proteins, including integral proteins that span the membrane and peripheral proteins that are attached to the surface. These proteins serve diverse functions such as transport, cell recognition, and signal transduction.

Functions of the Cell Membrane

The cell membrane serves several important functions, including:

1. Selective Permeability: The cell membrane regulates the entry and exit of substances into and out of the cell, allowing it to maintain internal conditions necessary for cellular function.

2. Cell Signaling: It plays a crucial role in cell signaling and communication by interacting with external signaling molecules and transmitting signals to the cell's interior.

3. Cell Adhesion: The cell membrane facilitates cell adhesion, allowing cells to form tissues and organs by sticking together.

4. Protection: It provides a protective barrier for the cell, shielding it from potentially harmful substances in the external environment.

In summary, the cell membrane is a dynamic structure essential for the survival and proper functioning of cells, and its composition and functions are intricately linked to the maintenance of cellular homeostasis and communication with the external environment.