GENERAL HISTOLOGY

Detailed explanation-1: -Active transport requires energy for the process by transporting molecules against a concentration or electrochemical gradient.

Detailed explanation-2: -Primary active transport directly uses a source of chemical energy (e.g., ATP) to move molecules across a membrane against their gradient.

Detailed explanation-3: -Active transport requires energy for the movement of molecules whereas passive transport does not require energy for the movement of molecules. In active transport, the molecules move against the concentration gradient whereas in passive transport, the molecules move along the concentration gradient.

Detailed explanation-4: -Active transport is usually associated with accumulating high concentrations of molecules that the cell needs, such as ions, glucose and amino acids. Examples of active transport include the uptake of glucose in the intestines in humans and the uptake of mineral ions into root hair cells of plants.

Detailed explanation-5: -There are three main active transport methods-ion pumps, exocytosis and endocytosis.