mechanics of breathing (RESPIRATORY SYSTEM)

Question 1

what are the 2 types of ventilation called

Answer 1

inspiration and expiration

Question 2

what is the 3 step process of inspiration

Answer 2

1. -intercostal muscles contract extending the ribcage up and out
   - diaphragm contracts and flattens, extending the chest cavity downwards
2. the lung volume increases
3. air flows from high pressure outside to low pressure inside lungs

Question 3

what is the 3 step process of expiration

Answer 3

1. • rib cage moves down and inwards as intercostal muscles relax
   • diaphragm relaxes, doming up and pushing into the chest cavity
2. lung volume decreases
3. air flows from high pressure inside the lungs to low pressure outside

Question 4

ventilation

Answer 4

the process by which air is moved into and out of the lungs

Question 5

how is the concentration gradient maintained

Answer 5

• continuous flow of blood
• continuous ventilation