EVERYDAY SCIENCE

Detailed explanation-1: -In cellular biology, active transport is the movement of molecules or ions across a cell membrane from a region of lower concentration to a region of higher concentration-against the concentration gradient. Active transport requires cellular energy to achieve this movement.

Detailed explanation-2: -During active transport, a protein pump uses energy, in the form of ATP, to move molecules from an area of low concentration to an area of high concentration.

Detailed explanation-3: -Diffusion. Diffusion is a passive process of transport. A single substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across the space.

Detailed explanation-4: -Protein pumps are transmembrane proteins, which are involved in the active transport of ions across the membrane against the concentration gradient.

Detailed explanation-5: -Active transport involves molecules moving against a gradient or other form of resistance, such as from an area of lower to higher charge. Active transport is used by cells to accumulate needed molecules such as glucose and amino acids.