Active transport + diffusion

• Active transport is when substances are moved from a dilute solution to a more concentrated solution but requires energy from respiration.
• Diffusion is the movement of particles from a low concentration to a high concentration without requiring energy from respiration.
• What is the name that does require energy from respiration?

  Active transport
• What is the name that doesn't require energy from respiration?

  Diffusion
• During diffusion, do the particles move against or down the concentration gradient?

  down
• During active transport, are particles moved down or against the concentration gradient?

  against