Active transport

• What is the final method by which particles can cross a cell membrane?

  Active Transport
• How does active transport differ from diffusion and osmosis?

  It requires energy to function
• What is the definition of active transport?

  Movement requiring energy across a membrane
• Why does active transport require energy?

  It moves substances against the concentration gradient
• From what process does active transport receive energy?

  Cellular respiration
• What structure must be numerous in cells that carry out a lot of active transport?

  Mitochondria
• What occurs during active transport?

  • Particles move from lower to higher concentration
  • Carrier proteins use energy from respiration
  • Energy is released during respiration in mitochondria
• What is the direction of particle movement during active transport?

  From lower to higher concentration
• How do carrier proteins function in active transport?

  They pump particles through the cell membrane