AP BIOLOGY

Detailed explanation-1: -During active transport, substances move against the concentration gradient, from an area of low concentration to an area of high concentration. This process is “active” because it requires the use of energy (usually in the form of ATP). It is the opposite of passive transport.

Detailed explanation-2: -In active transport, the movement of a substance across a membrane occurs against its concentration gradient (from low to high concentration).

Detailed explanation-3: -There are three main active transport methods-ion pumps, exocytosis and endocytosis.

Detailed explanation-4: -Active transport moves materials from lower to a higher concentration, while passive transport moves materials from higher to lower concentration. Active transport requires energy to proceed, while passive transport does not require the input of extra energy to occur.

Detailed explanation-5: -There are two types of active transport namely – Primary active transport and secondary active transport.