Endocytosis is a cellular process whereby molecules that cannot pass through a cell membrane passively are actively transported from the extracellular environment into the intracellular environment.

All cells have surface membranes and maintaining the surface area of this membrane is critical to the normal functioning of cells. The surface membranes of cells lining our lungs, guts and the ...

Each cell is separated from its environment by a membrane that protects the cell from the outside environment. However, this barrier can be overcome by certain chemicals that sustain the basic ...

To survive and fulfill their biological functions, cells need to take in material from their environment. In this process, proteins within the cell pull inward on its membrane, forming a pit that ...

All cells have surface membranes, and this membrane is especially important in the light-sensitive cells of the eyes in your body. Within your eyes are millions of photoreceptors - nerve cells that ...