There are various ways in which a substance can move from one side of the cell membrane to the other, a process known as diffusion.
All cells are contained within a semi-permeable bilipid shell referred to as the plasmatic cell membrane. This membrane offers structural integrity to the cell and controls the flow and concentration of substances on either side of the cell.
The passing of substances through the cell membrane can be classified in many ways, including:
1. Active Transports (Require the consumption of energy)
- Endocytosis.
- Exocytosis.
- Ionic pumps
2. Passive Transports (Those which do not consume energy)
- Simple diffusion.
- Facilitated diffusion.
- Osmosis.
among many others.
Though some of these examples require energy or the aid of other structures while others do not, all of the examples are forms of diffusion. Diffusion is what we call the process of crossing from one side of the plasmatic membrane to the other.
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