Alveoli Flashcards
1
Q
What is the primary site of gas exchange?
A
Alveoli
2
Q
What is a lung lobule?
A
cluster of alveoli surrounded by elastic fibres and network of capillaries. Supplied by a single bronchiole
3
Q
How many cells in alveoli wall?
A
1
4
Q
How is diffusion pathway so small?
A
1 cell thick epithelium fused with endothelium of capillaries
5
Q
What is the apical surface of the alveoli covered in?
A
Surfactant
6
Q
Describe emphysema
A
loss of elasticity of alveoli, obstructive disease.
7
Q
What does emphysema occur with in COPD?
A
chronic bronchitis
8
Q
What is chronic bronchitis?
A
Lungs cant clear mucus
9
Q
Describe asthma
A
obstructive disorder, too much mucus
