Active Transport

• What is the process called that moves substances from a more dilute solution to a more concentrated solution?

  Active transport
• Why is active transport necessary for cells?

  To bring in molecules that are at a higher concentration inside the cell
• What is the energy source required for active transport?

  Energy from respiration
• How does active transport differ from diffusion?

  • Active transport moves substances against the concentration gradient
  • Diffusion moves substances down the concentration gradient
  • Active transport requires energy from respiration
  • Diffusion does not require energy
• What is the term used to describe the difference in concentration between two areas?

  Concentration gradient
• What happens to molecules during diffusion?

  They move from high concentration to low concentration
• How does the presence of mitochondria relate to active transport in cells?

  Mitochondria provide energy for active transport
• Why can't glucose diffuse into the cell from the lumen of the small intestine?

  Because its concentration is higher inside the cell
• What do root hair cells transport into the plant?

  Minerals such as magnesium
• Why do plants need magnesium?

  To make chlorophyll in the leaves
• How do root hair cells utilize active transport to benefit the plant?

  They absorb ions from the soil for transport to the plant