Question

what are the functions of the plasma membrane? and Define defusion in biology ​

Answer 1

Answer:

The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.

Diffusion:

Diffusion is the movement of a substance from an area of high concentration to an area of low concentration. Diffusion happens in liquids and gases because their particles move randomly from place to place. Diffusion is an important process for living things; it is how substances move in and out of cells.

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Answer 2

The functions of plasma membrane are:

1) Protect cell from outer surroundings.

2) Transport nutrients inside cell.

3) Throw toxic substances out of the cell.

Diffusion: The movement of molecules from region of higher concentration to region of lower concentration.

The diffusion rate is also affected by:

1) Gradient of concentration.

2) The permeability of the membrane separating them.

3) Temperature and pressure