Active transport

• The special thing about active transport is that particles move against/up a concentration gradient
• Letter: C

  
• Letter: B

  
• Letter: D

  
• Letter: A

  
• In active transport, particles move against concentration gradient
• In active transport, particles move, on average, from low concentration to high
• energy for active transport is released by respiration and ATP is used to drive the transport process
• plants need ions inside them
• in the soils, ions are very dilute
• root hair cells cannot absorb minerals by normal diffusion because minerals are more concentrated in than out
• ions are absorbed into the plant by active transport, using energy from respiration