Active transport

• What is active transport?


  The movement of substances against their concentration gradient
• What is required for active transport to occur?


  Energy produced from cell respiration
• What type of membrane is involved in active transport?


  A partially permeable membrane
• In which direction does active transport move substances?


  From an area of low concentration to an area of high concentration
• What is the role of root hair cells in plants?


  To absorb mineral ions from the soil
• Why do root hair cells have millions of hairs?


  To increase the surface area for absorption
• Why is the concentration of minerals higher in the root hair cell than in the soil?

  Because active transport allows the plant to absorb minerals against the concentration gradient
• What is the significance of active transport in plants?


  • Allows absorption of minerals from dilute solutions
  • Essential for healthy growth
  • Operates against concentration gradients
• What is the relationship between active transport and cell respiration?


  • Active transport requires energy
  • Energy is produced from cell respiration
• How do organisms exchange substances with their environment?

  • Through exchange surfaces
  • Active transport and passive transport mechanisms
• What is the full definition of active transport 


  the movement of substances against the concentration gradient from an area of low concentration to an area of high concentration across a partially permeable membrane that requires energy from cell respiration