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Flashcards in Lecture 6 Deck (25)
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1

2

how does O2 and CO2 exchange in the capillaries at the alveoli?

passive diffusion

3

1?

2?

  1. Bronchiole
  2. alveoli

4

  1. Terminal bronchiole
  2. Alveoli appear
  3. Thick wall of bronchiole

5

An alveolus is a sphere made up of what cell?

pneumocytes

6

1?

2?

3?

  1. Respiratory bronchiole
    • Similar to terminal bronchioles, but with alveoli

  2. Smooth Muscle
  3. Alveolus

7

4

5

  • 4- Alveolar duct
    • A duct made of alveoli
  • 5- Alveolar sac
    • A cluster of alveoli at the end of an alveolar duct

8

what surrounds an alveolar sac?

  1. capillaries
  2. elastic fibers

9

1

2

  1. Terminal bronchiole

  2. Respiratory bronchiole

10

  • 3?
  • asterisks?

3- Alveolar ducts
Stars- alveolar sac

11

  1. What is this a photo of?
  2. blue circle?

  1. pneumonia, containing mucous and leucotyes in the bronchiole
  2. alveoli filled with leukocytes and macrophages

12

  1. what are the 2 types of pneumocytes?
    • what type of cell is it?
    • what does each do?

  1. Type I pneumocyte
    • Simple squamous- for gas exchange
  2. Type II pneumocyte
    • cuboidal- secretes surfactant (lipoprotein)

13

1?

2?

  1. type I pneumocyte
  2. type II pneumocyte

 

wont have to differentiate in lab

14

3?

4?

3- capillary and RBC

4- Alveolar macrophage

15

  1. what is it
  2. What is it
    • what does it allow?

  1. alveolar macrophage
  2. alveolar pore
    • allows alveolar macrophage to go through and move from one alveolus to another

16

  1. what is the interalveolar septum
  2. what does it contain?

  1. Connective tissue between two adjacent alveoli
  2. elastic fibers
    • interalveolar connective tissue
    • capillaries (highly vascularized)

17

what are 2 forces that resist alveolar distension

  1. elastic resistance
  2. surface tension exerted by a thin film of fluid on the inner alveolar surface of alveoli

18

  1. What does the wall of the alveoli have a tendency to do alone?
  2. why?

  1. collapse
  2. surface tension exerted by a thin film of fluid on the inner alveolar surface of alveoli

19

  1. what does surfactant do to surface tension?
  2. what does it do during inspiration?
  3. exhalation?

  1. Surfactant lowers surface tension
  2. During inspiration- Easier to inflate alveoli 
  3. During exhalation- Alveoli do not collapse 

20

what is the equation of pressure exerted on the alveoli?

  • P=2T/r

P= pressure

T= tension

r= radius

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1

2

3

  1. Type I pneumocyte
  2. Type II pneumocyte
  3. basal lamina

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4

5

6

4- endothelium

5- blood gas barrier

6- capillary

 

23

what 3 parts make up the blood-gas barrier?

  1. type I pneumocyte
  2. basal laminae
  3. endothelial cell

24

1?

2?

3?

  1. type I pneumocyte
  2. basal laminae
  3. endothelial cell

25

1?

2?

  1. alveolus
  2. capillaries