Active Transport

• What is the main topic discussed in the video?

  Active transport in root hair cells of plants
• How does diffusion differ from active transport?


  Diffusion moves substances down their concentration gradient, while active transport moves them against it
• What is diffusion?


  The process by which substances move down their concentration gradient
• Why is diffusion considered a passive process?


  Because it does not require any energy from the cell
• What analogy is used to describe diffusion?


  Water flowing downhill
• What is active transport?


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


  Energy from the cell
• How can you compare active transport to a physical process?


  It is like water moving uphill
• What type of proteins are required for active transport?


  Special proteins that sit in the membrane
• Where does the energy for active transport come from?


  Cellular respiration in the mitochondria
• What molecule stores energy for the cell?

  ATP (adenosine triphosphate)
• How is active transport defined?


  As the movement of molecules across a cell membrane from lower to higher concentration requiring energy
• What role do root hair cells play in plants?


  • Absorb water and mineral ions from the soil
  • Adapted with long hair-like protrusions for increased surface area
• Why do plants need to absorb minerals like magnesium and nitrates?


  To produce chlorophyll and proteins
• Why can't plants absorb minerals by diffusion in this context?


  Because the minerals are at a higher concentration inside the cell than outside
• What adaptation do root hair cells have to support active transport?


  They have lots of mitochondria
• What are the adaptations of root hair cells for their role?


  • Large surface area for absorption
  • High number of mitochondria for energy production
• What is the purpose of the learning platform mentioned in the video?


  To watch videos, practice questions, and track progress
• What is the format of the additional resources provided in the video?

  A playlist of videos for the subject