Answer
Primary active transport- the movement of substances against a concentration or electrochemical gradient. Method- solute pumps in plasma membranes
What is transported- ions
Energy- hydrolysis of ATP
Secondary active transport- the indirect movement of other solutes with the ions that are transported in primary active transport
Methods- diffusion through symporters and antiporters in the plasma membranes
What is transported- sugars, amino acids, and ions
Energy- the high ion gradients made by primary active transport
Work Step by Step
Primary active transport is the movement of substances against a concentration or electrochemical gradient. Solute pumps in plasma membranes transport ions across the membrane. It is fueled by hydrolysis of ATP.
Secondary active transport is the indirect movement of other solutes with the ions that are transported in primary active transport. Symporters in the plasma membranes allow solutes like sugars, amino acids, and ions to pass through together with ions that are diffusing across the membrane. Antiporters allow solutes in pass through opposite directions. It is fueled by the high ion gradients made by primary active transport.
