Difference Between Primary Active Transport And Secondary Active Transport May 2026

Integral membrane proteins called "pumps" bind to a molecule (like a sodium ion) on one side of the membrane. They then break a molecule of Adenosine Triphosphate (ATP) into ADP + Phosphate. This chemical reaction releases energy, which changes the shape of the pump, forcing the molecule across the membrane against its gradient.

This is where comes in. However, not all active transport is the same. Biologists split it into two distinct categories: Primary Active Transport and Secondary Active Transport . Integral membrane proteins called "pumps" bind to a

Most people know about (diffusion), where substances flow downhill from high to low concentration without using energy. But what happens when a cell needs to move a substance against its concentration gradient—from low to high concentration? Integral membrane proteins called "pumps" bind to a