Active Transport High To Low Updated Jun 2026

Students often think that because molecules are moving from High to Low concentration (like in exocytosis), it must be passive. Remember: If the cell membrane has to change shape or work against physics (via pumps), it costs energy, and it is Active Transport.

Active transport is a type of transport across cell membranes that requires energy input from the cell. Unlike passive transport, which relies on concentration gradients and does not require energy, active transport involves the movement of molecules against their concentration gradient. In other words, active transport enables cells to move molecules from an area of low concentration to an area of high concentration, or from high to low concentration, against the natural direction of diffusion. active transport high to low

In biological systems, movement from concentration is almost always Passive Transport . Active Transport is defined by the movement of materials from Low to High concentration (against the concentration gradient). Students often think that because molecules are moving