Respiratory 15

Question 1

What is Lung Compliance determined by?

Answer 1

• Elastic components of lungs and airway tissue

* Surface tension at the air water interface within the alveoli

Question 2

Where are elastin and collagen located in the lungs?

Answer 2

Between the different alveoli around blood vessels and bronchi

Question 3

What can the elastin and collagen in the lungs influence?

Answer 3

How stiff the lung is

Question 4

What are the characteristics of elastin?

Answer 4

• Weak spring
• Low tensile strength
• Extensible

Question 5

What are the characteristics of collagen?

Answer 5

• Strong twine
• High tensile strength
• Inextensible

Question 6

Which properties does collagen give more of?

Answer 6

Stiffness

Question 7

Increasing what elastic component of the lung gives fibrosis?

Answer 7

Collagen

Question 8

What is floppy lungs the result of?

Answer 8

Elastin destruction and alveolar wall destruction

Question 9

What happens with changes in transpulmonary pressure and volume in floppy lungs?

Answer 9

For little changes in Ptp there are large changes in lung volume

Question 10

What are the Alveoli like in people with emphysema?

Answer 10

In people with emphysema there are large alveolar spaces and reduced area for gas exchange

Question 11

What causes the floppy lung in emphysema?

Answer 11

The elastin being eliminated

Question 12

Which elastic molecule is Pulmonary Fibrosis caused by?

Answer 12

Collagen deposition

Question 13

How is Transpulmonary pressure affected by Pulmonary fibrosis?

Answer 13

Higher transpulmonary pressures are necessary to generate changes in lung volume