- Passive Transport: It is a type of transport that does not require energy input from the cell. There are two main types of passive transport:
- Diffusion: It is the movement of molecules from an area of higher concentration to an area of lower concentration. This process continues until the concentration of the molecule is equal on both sides of the membrane.
- Osmosis: It is the movement of water molecules from an area of higher concentration to an area of lower concentration across a selectively permeable membrane.
- Active Transport: It is a type of transport that requires energy input from the cell. There are two main types of active transport:
- Primary Active Transport: It uses energy from ATP to move molecules or ions against their concentration gradient, from an area of lower concentration to an area of higher concentration.
- Secondary Active Transport: It uses the energy stored in the concentration gradient of one molecule or ion to move another molecule or ion against its concentration gradient.