active transport

    Cards (16)

    • What should you be able to describe by the end of the video on active transport?

      How substances are absorbed by active transport and examples in animals and plants
    • What is diffusion?

      The net movement of particles from an area of higher concentration to an area of lower concentration
    • What does the term "net" mean in the context of diffusion?

      Overall movement of particles
    • What is a concentration gradient?

      A region with a high concentration and a region with a low concentration
    • How does active transport differ from diffusion?

      Active transport moves substances against the concentration gradient, while diffusion moves them down the gradient
    • What is required for active transport to occur?

      Energy from respiration
    • What is an example of active transport in the human body?

      Transport of sugars such as glucose in the small intestine
    • Why can't sugars diffuse into the cell from the lumen of the small intestine?

      Because the concentration of sugars is lower in the lumen than inside the cell
    • What role do mitochondria play in active transport?

      Mitochondria provide the energy needed for active transport
    • What is an example of active transport in plants?

      Transport of ions such as magnesium into root hair cells
    • Why do plants need magnesium?

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

      They move ions from a lower concentration in the soil to a higher concentration inside the cell
    • What happens to the ions after they are transported into the root hair cells?

      They are transported to the xylem vessels and moved to the leaf
    • What do root hair cells have that supports active transport?

      Lots of mitochondria
    • What are the key differences between active transport and diffusion?

      • Active transport moves substances against the concentration gradient, while diffusion moves them down.
      • Active transport requires energy from respiration, whereas diffusion does not.
    • What are the examples of active transport in animals and plants?

      • Animals: Transport of glucose in the small intestine.
      • Plants: Transport of magnesium ions in root hair cells.