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: -Active transport moves molecules and ions from lower concentration to higher concentration with the help of energy in the form of ATP. On the other hand, passive transport moves molecules and ions from a higher concentration to lower concentration without any energy.

Detailed explanation-3: -Some examples of active transport include the uptake of glucose in the intestine of the human body and the uptake of minerals or ions into the root hair cells of plants.

Detailed explanation-4: -There are three main active transport methods-ion pumps, exocytosis and endocytosis.