Respiration Part 1

Question 1

Define Boyle’s law in relation to the pressure of air?

(Charles Boyle- as his inanity increases, Jakes patience decreases)

Answer 1

PRESSURE AND VOLUME
The pressure of a gas is inversely proportional to the volume it occupies within a container/ thoracic cavity

eg: if lung volume increases, lung pressure decreases

Question 2

What two things does airflow depend on within airways?

Answer 2

1. The pressure difference between two different ends of an airway
   2.The resistance of the actual airway to airflow

Airflow= P1-P2 / Resistance

Question 3

What does resistance within an airway depend on?

Answer 3

DIAMETER of the airway- COPD and asthma

Question 4

Define Dalton’s law?

Answer 4

The total pressure of a gas mixture is the total sum of the pressure that each gas would exert INDEPENDENTLY

P air= P02 + PCO2 + PN2

Question 5

Define Fick’s law of Diffusion?

Answer 5

The rate of transfer of a gas is proportional to the tissue area, the diffusion coefficient of the gas, the difference in partial pressure of the gas and inversely proportional to the cell thickness?

“Fick sake”
1. Tissue surface area (A)
2. Diffusion coefficient (D)
3. Difference in pp (p1-p2)
4. Tissue thickness (T)

Question 6

How do you calculate the rate of diffusion ?
(V)

Answer 6

V gas= A/T x D X (P1-P2)

“Fick sake”
1. Tissue surface area (A)
2. Diffusion coefficient (D)
3. Difference in pp (p1-p2)
4. Tissue thickness (T)

Question 7

Describe the main differences between the conducting zone and the respiratory zone?

Answer 7

Conducting zone= all anatomical structures
1. Passageway for air
2. Humidifies and filters air
3.Warmed and moistened air
4.Filtered by mucus and cilia

Respiratory zone- where gaseous exchange takes place between bronchioles and alveoli