What is a cell wall or cell membrane?
A cell wall is a tough, flexible, and rigid layer that surrounds some types of cells. When I get the definition of cell membrane, I'll tell you :)
-MC
A thin membrane enclosing the cytoplasm of a cell is a cell membrane. Hope this helped!
-MC
Since this is not my area of expertise, I searched Google under the key words "cell wall membrane" to get these possible sources:
http://en.wikipedia.org/wiki/Cell_wall
http://en.wikipedia.org/wiki/Cell_membrane
(Broken Link Removed)
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
I hope this helps a little more. Thanks for asking.
A cell wall or cell membrane is a vital part of a cell that acts as a protective barrier. It serves to separate the interior of the cell from its external environment and controls the movement of substances in and out of the cell.
To understand what a cell wall or cell membrane is, we first need to explain what a cell is. A cell is the basic structural and functional unit of all living organisms. It is a microscopic compartment surrounded by a membrane that contains various structures called organelles and carries out specific functions necessary for life.
Now, to get a better understanding of a cell wall or cell membrane, let's break down their definitions:
Cell Wall:
- A cell wall is a rigid outer layer found in plant cells, bacteria, fungi, and some protists.
- It provides mechanical support and protection to the cell, preventing it from bursting or collapsing.
- The cell wall is composed mainly of cellulose in plant cells, while bacterial cell walls are made up of peptidoglycan.
Cell Membrane (Plasma Membrane):
- The cell membrane, also known as the plasma membrane, is a thin, flexible barrier that encloses the contents of a cell.
- It is composed of a lipid bilayer consisting of phospholipids, cholesterol, and proteins.
- The cell membrane regulates the movement of substances in and out of the cell, controlling the exchange of nutrients, waste products, and signaling molecules.
- It also plays a role in cell communication and recognition.
To summarize, a cell wall is a rigid outer layer found in some cells (such as plant cells), providing structural support and protection. On the other hand, the cell membrane is a thin, flexible barrier that surrounds all cells, controlling the movement of substances and maintaining cell integrity.