1. Gaseous exchange

• What is the name of the cells that line our airways?

  Epithelial cells
• Which cell produces mucus in the airways?

  Goblet cells
• What does Fick's law of diffusion state?

  Rate of diffusion is proportional to surface area
• How are the lungs adapted to have a high surface area?

  They contain numerous alveoli
• Which adaptation gives the alveoli and capillary walls a short diffusion pathway?

  Thin walls of alveoli and capillaries
• What is the significance of the CFTR channel proteins in epithelial cells?

  They have the wrong shape
• What is mucus made up of

  •  Water
  • Ions
  • Mucin (sugar)
  • Proteins
• What does mucus do 

  • Traps dust and bacteria that enters the airways.
  • Ciliated epithelial cells line the Airways. 
  • Cilla beat to remove mucus with dust or bacteria.
• Cystic fibrosis effects

  • Difficulty to remove mucus
  • Increases a chance of a trust infection
  • Difficulty in gas exchange
• Flicks law

  Rate of diffusion x surface area x concentration gradient (÷ diffusion distance)