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Definitions from the Web

Plasma Membrane

Description:

The plasma membrane, also known as the cell membrane or plasmalemma, is a vital component of cells that separates the internal environment of the cell from its external surroundings. It consists of a phospholipid bilayer embedded with various proteins, maintaining cell integrity, regulating the passage of molecules, and facilitating cell communication.

Senses/Usages:

1. Biological Sense:

In biology, the term "plasma membrane" refers to the selectively permeable boundary of a cell. It plays a crucial role in controlling the transport of molecules such as ions, nutrients, and wastes in and out of the cell.

Example Sentence: The plasma membrane acts as a barrier, allowing only certain substances to enter or exit the cell.

2. Electrical Sense:

In the study of physics, a "plasma membrane" can refer to the separation between plasma and the surrounding environment in plasma physics and electrical engineering.

Example Sentence: The plasma membrane surrounding the plasma in a fusion reactor prevents the plasma from touching the reactor's walls.

3. Local Usage:

In local contexts, the term "plasma membrane" can also be used metaphorically to describe a delicate boundary or separation between different social or cultural groups.

Example Sentence: The plasma membrane between the two communities was easily breached during the festive celebration, fostering unity and understanding.