Cell Membrane Structure Labeled. Situated just beneath the cell wall, it is selectively permeable in nature that protects the. It lies between the cell membrane and the outer membrane and holds digestive enzymes, protective enzymes, and some proteins that are important in transport and chemotaxis.
Also, it controls the entry and exit of nutrients and other microscopic entities into the cell. It regulates the movement of materials into and out of the cell and facilitates electrical signaling between them. To package and ship cellular materials.
What change takes place in the cell membrane if a signal molecule causes a transport protein to open.
Body cells can be categorized into about 300 types, such as neurons, epithelial cells, muscle cells, and red bloodcells each type of cell has a special structure for carrying out particular functions although these cells differ in size, shape, and function. The cell wall is composed of molecules such as cellulose. Cell membrane, also called plasma membrane, thin membrane that surrounds every living cell, delimiting the cell from the environment around it. All cells are enclosed by a cell membrane.
