CHP11

Question 1

Gas exchange features

Answer 1

• Large surface area faster diffusion of gases across surface
• Thin walls to ensure diffusion distances remain short
• Good ventilation with air so diffusion gradients can be maintained
• Good blood supply to maintain high concentration gradient so diffusion occurs faster

Question 2

Inspired air and expired air

Answer 2

O- 21. 16
Co2- 0.04. 4
N- 78. 78

Question 3

Exercise increases

Answer 3

frequency and depth of breathing

Question 4

The function of the cartilage

Answer 4

to support the airways and keep them open during breathing

Question 5

diaphragm

Answer 5

is a thin sheet of muscle that separates the chest cavity from the abdomen;