Active trans port

• Active Transport


  Process where a cell moves molecules against a concentration gradient, using energy
• Active Transport


  1. Concentration gradient

  2. Energy required

  3. Minerals and water taken in
• Root Hairs


  • Large surface area
  • Take up minerals from soil
• Concentration of minerals


  Higher in root hair cells than in surrounding soil
• Minerals would move out of root hairs if they followed diffusion
• Active Transport


  Allows plant to absorb minerals from dilute solution
• Concentration of nutrients


  Lower in gut than in blood
• Concentration gradient


  Wrong way for nutrients to enter blood
• Active transport uses energy, unlike diffusion
• Purpose of active transport

  To move molecules against a concentration gradient