Question

Mention the functions of plasma membrane.

Answer 1

Plasma membrane:

1. The plasma membrane is the outer limiting boundary of the cell that encloses its contents and separates it from the external environment.
2. It helps the cell communicate with other cells through its cell junctions.
3. It helps to maintain the shape of the cell.
4. It allows the entry and exit of some materials in and out of the cell thereby playing an important role in the transport of materials across the membrane.
5. It also prevents the entry and exit of certain substances since it is a selectively permeable membrane.
6. It acts as a barrier between the cell and the surrounding environment.
7. It is also responsible for the motility of the cell with the help of its extensions such as cilia and flagella.