Primary Secondary Active Transport Patched -

Na+/K+cap N a raised to the positive power / cap K raised to the positive power ATPase). It uses ATP to pump three Na+cap N a raised to the positive power ions out of the cell and two K+cap K raised to the positive power ions into the cell, both against their gradients.

| Feature | Primary Active Transport | Secondary Active Transport | | :--- | :--- | :--- | | | ATP hydrolysis | Ion gradient (e.g., Na⁺ or H⁺ gradient) | | Indirect Energy Source | None | ATP (used earlier to create the gradient) | | Transport Protein | ATPase pump (e.g., Na⁺/K⁺ pump) | Symporter or Antiporter | | Example | Ca²⁺ pump, H⁺ pump (in mitochondria) | SGLT (glucose), Na⁺/Ca²⁺ exchanger | primary secondary active transport

In primary active transport, energy is derived from the hydrolysis of ATP (adenosine triphosphate). Na+/K+cap N a raised to the positive power

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. Both substances move in the same direction

) in . By doing this, it creates a massive concentration imbalance (a gradient) that the cell can use later. 2. Secondary Active Transport: The "Co-attraction" Method

Primary active transport involves the direct use of ATP energy to transport molecules against their concentration gradient. This process is also known as "direct active transport." The energy from ATP hydrolysis is used to pump molecules across the membrane, often against their electrochemical gradient.