Active Transport

Front

Movement of substances across a plasma membrane against a concentration gradient.

Back

What is active transport?

Front

ATP (adenosine triphosphate) molecules.

Back

What energy source is required for active transport?

Front

They bind with specific molecules or ions and change shape when a phosphate group attaches.

Back

What is the role of carrier proteins in active transport?

Front

By changing shape when a phosphate group from ATP attaches, allowing molecules or ions to move across a membrane.

Back

How do carrier proteins facilitate the movement of substances?