Cell Membrane Definition And Function Pdf

This Selectively Permeable membrane regulates what passes into and out of the cell.

Cell membrane definition and function pdf. Thin barrier separating inside of cell cytoplasm from outside environment Function. The cell membrane is a complex barrier separating every cell from its external environment. The cell membrane plasma membrane is a thin semi-permeable membrane that surrounds the cytoplasm of a cell.

That of the extracellular fluid. 1 Isolate cells contents from outside environment 2 Regulate exchange of substances between inside and outside of cell 3 Communicate with other cells. Cell Membrane is a boundary of a cell covered with cell walls.

It is flexible and can fold in as in food vacuoles of Amoeba or fold out as in the formation of pseudopodia of Amoeba Animal cell 1. The cell membrane functions like a gate controlling which molecules can enter and leave the cell. The plasma membrane protects the cell from damage caused by environmental exposure.

It is also known as the cell surface membrane or plasmalemma. The cell membrane functions as a barrier keeping cell constituents in and unwanted substances out and as a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products. The cell membrane keeps the organelles of the cell from drifting away and controls the movement of things into and out of.

The contents of a cell are supported by this membrane. Each cell has a limiting boundary the cell membrane plasma membrane or plasmalemma. The plasma membrane comprises lipids and proteins.

Components of the cell are enclosed in a membrane. The membrane separates cells from one another and also the cell from the surrounding medium. Cell membrane thin membrane that surrounds every living cell.