Breathing

Question 1

Describe the function of each part of the respiratory system

Answer 1

Nasal cavities: Contain cilia that warms,moistens and filters air
Trachea:Airway supported by rings of cartilage
Bronchi:Large air passages to the lungs
Bronchioles: Smaller passageways to transport air
Alveoli: Many of them for gaseous exchange

Question 2

What happens to the different structures of inspiration at rest?

Answer 2

Ribs: Move up and out
Diaphragm: Contracts and flattens
Lungs: Expand to drawn in air which increases volume and reduces pressure

Question 3

What happens during inspiration?

Answer 3

1. External intercostals contract
2. Ribs move up and out
3. Diaphragm contracts and flattens
4. Pressure in the lungs decreases
5. Air rushes in

Question 4

What changes happen to inspiration during exercise than at rest?

Answer 4

1. Intercostals, pectorals and sternocleidomastoid contracts
2. Ribs=further
3. Diaphragm=more
4. Pressure decreases further
5. Air rushes in quicker

Question 5

Describe the five stages of expiration

Answer 5

1. Intercostals contract
2. Ribs move down and in
3. Diaphragm relaxes and moves up
4. Pressure in the lungs decreases
5. Air rushes out

Question 6

Describe the differences in expiration at rest versus during exercise

Answer 6

1. Internal intercostals contract
2. Ribs move at a faster rate
3. Abdominal contract and pulls the diaphragm up
4. Pressure decreases further
5. More air rushes out quicker