AP BIOLOGY

Detailed explanation-1: -Active transport uses energy to transport molecules across the plasma membrane. This uses energy from ATP. They also use pumps to get molecules in or out of the cell. Passive Transport does NOT use energy to transport molecules across the membrane.

Detailed explanation-2: -In active transport, the particles move across a cell membr ane from a lower concentration to a higher concentration. Active transport is the energy-requiring process of pumping molecules and ions across membranes “uphill”-against a concentration gradient.

Detailed explanation-3: -Endocytosis. Endocytosis is a type of active transport that moves particles, such as large molecules, parts of cells, and even whole cells, into a cell.

Detailed explanation-4: -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.