Specialised exchange surfaces

• What are specialized exchange surfaces?

  Parts of an organism for substance exchange
• What are the main specialized exchange surfaces in humans?

  Alveoli and Villi
• What is the function of alveoli?

  To exchange oxygen and carbon dioxide
• Where are alveoli located?

  At the ends of the bronchioles
• What do Villi do in the small intestine?

  Help absorb nutrients like glucose
• What specialized exchange surface do plants have for water absorption?

  Root hair cells
• What is the role of leaves in plants regarding exchange surfaces?

  To absorb carbon dioxide from the air
• What common feature do specialized exchange surfaces share regarding surface area?

  They have a large surface area for diffusion
• Why is a large surface area important for exchange surfaces?

  It allows more molecules to diffuse simultaneously
• What shape do Villi have to enhance their function?

  Long thin shape
• Why are specialized exchange surfaces usually very thin?

  To reduce diffusion distance for substances
• What does it mean for exchange surfaces to be permeable?

  They allow substances to diffuse across
• How does a good blood supply benefit exchange surfaces?

  It helps maintain a concentration gradient
• How does blood supply affect glucose absorption in Villi?

  It quickly removes absorbed glucose from blood
• What is the role of the external medium in exchange surfaces?

  It maintains concentration gradients for diffusion
• What is an example of an external medium for Villi?

  Food
• What is an example of an external medium for alveoli?

  Air
• What are the five main features of specialized exchange surfaces?

  • Large surface area
  • Very thin surfaces
  • Permeable to exchanged substances
  • Good blood supply
  • Good supply of external medium
• What is the purpose of the learning platform mentioned in the video?

  To watch videos and track progress
• What can students do on the learning platform?

  Practice with questions and watch videos
• Is the learning platform mentioned in the video free?

  Yes, it is completely free
• How are the videos organized on the learning platform?

  In a playlist for the subject
• Who is the presenter of the video?

  Amadeus
• What does the presenter hope viewers will do after watching the video?

  Enjoy and learn from the content