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Flashcards in gas exchange Deck (18)
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1

b which mechanism do gasses move between alveoli and capillaries?

diffusion

2

what does a conduction airway consist of?

trachea + bronchi + nonrespiratory bronchioles

3

bronchi containing cartilage do not participate in gas exchange, instead they form what?

anatomical dead space

4

alveoli consist of how many types of epithelium?

2

5

what is the function of type 1 epithelium on alveoli?

gas exchange

6

what is the function of type 2 epithelium on alveoli?

produce pulmonary surfactant

7

which alveolar epithelium is most abundant?

type 1 (97%)

8

what i the function of alveolar macrophages?

remove debris

9

how does the structure of alveoli aid gas exchange?

- large SA
- very thin walls

10

what are the 2 blood supplies to the lungs?

pulmonary circulation and bronchial circulation

11

what is pulmonary circulation

brings deoxygenated blood from lungs to heart then rest of body

12

what is bronchial circulation?

brings oxygenated blood to lung parenchyma (portion involved in gas exchange)

13

which circulation supplies the lung tissue?

bronchial circulation

14

what % of total blood vol is in pulmonary circulation at any 1 time?

10%

15

describe the movement of oxygen and CO2 in the pulmonary circuit

oxygen enters blood
CO2 leaves blood

16

describe the movement of oxygen and CO2 in the systemic circuit

oxygen leaves blood
CO2 enters blood

17

which gas, oxygen or CO2, has a greater pressure gradient?

oxygen

18

which gas, CO2 or oxygen is more diffusible?

CO2