1.15 - Active Transport

• What is active transport?

  The movement of molecules across a cell membrane, against the concentration gradient (from a region of lower concentration to higher concentration), which requires energy from cellular respiration.
• What are differences between active transport and diffusion?

  active transport requires energy from the cell (so an active process)
• What is an example of where active transport is used?

  Root hair cells in plant roots
• Where do plants absorb mineral ions from?

  Soil
• Why can’t plants absorb mineral ions by diffusion?

  Their concentration is higher in the cell than in the soil