Active Transport

ACTIVE TRANSPORT

• Occurs against a concentration gradient.
• Requires energy.
  • This energy comes from cellular respiration.
• Active transport means cells an absorb ions from very dilute solutions.

Examples

• Uptaking mineral ions through the soil.
• Glucose moves from the gut and kidney to the blood.
• Salt glands in marine animals (as the kidneys cannot dispose of all the salt that they take up).