1.3.3 Active Transport

• What is active transport?

  Moving substances from a more dilute solution to a more concentrated solution against a concentration gradient.
• What does active transport require?

  Energy from respiration.
• What does active transport allow?

  • Mineral ions to be absorbed into plant root hairs from very dilute solutions in the soil - plants require ions for healthy growth.
  • Sugar molecules to be absorbed from lower concentrations in the gut into the blood which has a higher sugar concentration - sugar molecules are used for cell respiration.