Question

which type of membrane transport process uses atp as a source of energy? simple diffusion, facilitated diffusion, primary active transport, osmosis, i dont know yet

Explanation:

• Simple diffusion: Passive transport, no energy (including ATP) needed. Molecules move down concentration gradient.
• Facilitated diffusion: Also passive, uses transport proteins but no ATP. Moves down gradient.
• Primary active transport: Requires ATP directly to move molecules against concentration gradient (e.g., sodium - potassium pump).
• Osmosis: Passive movement of water, no ATP.

Answer:

C. Primary active transport