Lecture 6 Flashcards
1
Q
A
2
Q
how does O2 and CO2 exchange in the capillaries at the alveoli?
A
passive diffusion
3
Q
1?
2?
A
- Bronchiole
- alveoli
4
Q
A
- Terminal bronchiole
- Alveoli appear
- Thick wall of bronchiole
5
Q
An alveolus is a sphere made up of what cell?
A
pneumocytes
6
Q
1?
2?
3?
A
- Respiratory bronchiole
- Similar to terminal bronchioles, but with alveoli
- Smooth Muscle
- Alveolus
7
Q
4
5
A
- 4- Alveolar duct
- A duct made of alveoli
- 5- Alveolar sac
- A cluster of alveoli at the end of an alveolar duct
8
Q
what surrounds an alveolar sac?
A
- capillaries
- elastic fibers
9
Q
1
2
A
- Terminal bronchiole
- Respiratory bronchiole
10
Q
- 3?
- asterisks?
A
3- Alveolar ducts
Stars- alveolar sac
11
Q
- What is this a photo of?
- blue circle?
A
- pneumonia, containing mucous and leucotyes in the bronchiole
- alveoli filled with leukocytes and macrophages
12
Q
- what are the 2 types of pneumocytes?
- what type of cell is it?
- what does each do?
A
- Type I pneumocyte
- Simple squamous- for gas exchange
- Type II pneumocyte
- cuboidal- secretes surfactant (lipoprotein)
13
Q
1?
2?
A
- type I pneumocyte
- type II pneumocyte
wont have to differentiate in lab
14
Q
3?
4?
A
3- capillary and RBC
4- Alveolar macrophage
15
Q
- what is it
- What is it
- what does it allow?
A
- alveolar macrophage
- alveolar pore
- allows alveolar macrophage to go through and move from one alveolus to another
16
Q
- what is the interalveolar septum
- what does it contain?
A
- Connective tissue between two adjacent alveoli
- elastic fibers
- interalveolar connective tissue
- capillaries (highly vascularized)
17
Q
what are 2 forces that resist alveolar distension
A
- elastic resistance
- surface tension exerted by a thin film of fluid on the inner alveolar surface of alveoli
18
Q
- What does the wall of the alveoli have a tendency to do alone?
- why?
A
- collapse
- surface tension exerted by a thin film of fluid on the inner alveolar surface of alveoli
19
Q
- what does surfactant do to surface tension?
- what does it do during inspiration?
- exhalation?
A
- Surfactant lowers surface tension
- During inspiration- Easier to inflate alveoli
- During exhalation- Alveoli do not collapse
20
Q
what is the equation of pressure exerted on the alveoli?
A
- P=2T/r
P= pressure
T= tension
r= radius
21
Q
1
2
3
A
- Type I pneumocyte
- Type II pneumocyte
- basal lamina
22
Q
4
5
6
A
4- endothelium
5- blood gas barrier
6- capillary
23
Q
what 3 parts make up the blood-gas barrier?
A
- type I pneumocyte
- basal laminae
- endothelial cell
24
Q
1?
2?
3?
A
- type I pneumocyte
- basal laminae
- endothelial cell
25
Q
1?
2?
A
- alveolus
- capillaries
