Primary Secondary Active Transport

Both substances move in the same direction. An example is the SGLT1 transporter , which pulls glucose into intestinal cells by "coupling" it with sodium ions that are rushing back into the cell.

: This process creates an electrochemical gradient , which stores potential energy. 2. Secondary Active Transport primary secondary active transport

| | Primary Active Transport | Secondary Active Transport | | --- | --- | --- | | | Direct ATP energy | Existing electrochemical gradient | | Transport Mechanism | Pumps (e.g., Na+/K+-ATPase) | Cotransport proteins (e.g., symporters, antiporters) | | Examples | Sodium-potassium pump, proton pump | Sodium-glucose cotransport, amino acid transport | Both substances move in the same direction

Active transport is the movement of molecules across a cell membrane from an area of lower concentration to an area of higher concentration, requiring energy input. This process is essential for maintaining cellular homeostasis, regulating the concentration of essential nutrients and waste products, and generating electrochemical gradients. Na+/K+-ATPase) | Cotransport proteins (e.g.