1.2.2 Gaseous exchange in the alveoli

• The alveoli have specialized structures, including thin walls, a large surface area, and a rich blood supply
• The rich blood supply of the alveoli is essential for transporting gases to and from the bloodstream
• The large surface area of the alveoli maximizes the area available for gas exchange.
• The concentration gradient is crucial for efficient gaseous exchange in the alveoli.
• Asthma causes bronchoconstriction, which narrows airways and hinders gas exchange.
• What are the alveoli in the lungs called?

  Tiny air sacs
• Why is a large surface area important for the alveoli?

  Maximizes gas exchange
• What gases are exchanged in the alveoli during gaseous exchange?

  Oxygen and carbon dioxide
• Gaseous exchange in the alveoli occurs through diffusion.


  True
• How does pneumonia affect gas exchange in the alveoli?

  Reduces surface area
• What is the primary effect of conditions like pneumonia and asthma on gaseous exchange?

  Reduces respiratory efficiency
• The thin walls of the alveoli allow for rapid diffusion of oxygen and carbon dioxide.


  True
• The main function of the alveoli is to facilitate gaseous exchange between the lungs and the bloodstream.


  True
• How does a rich blood supply to the alveoli improve gas exchange?

  Transports gases efficiently
• Optimal gas exchange is essential for supplying the body with sufficient oxygen.


  True
• COPD damages alveolar walls, reducing their surface area for gas exchange.

  True