gas exchange

Question 1

b which mechanism do gasses move between alveoli and capillaries?

Answer 1

diffusion

Question 2

what does a conduction airway consist of?

Answer 2

trachea + bronchi + nonrespiratory bronchioles

Question 3

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

Answer 3

anatomical dead space

Question 4

alveoli consist of how many types of epithelium?

Answer 4

2

Question 5

what is the function of type 1 epithelium on alveoli?

Answer 5

gas exchange

Question 6

what is the function of type 2 epithelium on alveoli?

Answer 6

produce pulmonary surfactant

Question 7

which alveolar epithelium is most abundant?

Answer 7

type 1 (97%)

Question 8

what i the function of alveolar macrophages?

Answer 8

remove debris

Question 9

how does the structure of alveoli aid gas exchange?

Answer 9

• large SA

- very thin walls

Question 10

what are the 2 blood supplies to the lungs?

Answer 10

pulmonary circulation and bronchial circulation

Question 11

what is pulmonary circulation

Answer 11

brings deoxygenated blood from lungs to heart then rest of body

Question 12

what is bronchial circulation?

Answer 12

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

Question 13

which circulation supplies the lung tissue?

Answer 13

bronchial circulation

Question 14

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

Answer 14

10%

Question 15

describe the movement of oxygen and CO2 in the pulmonary circuit

Answer 15

oxygen enters blood

CO2 leaves blood

Question 16

describe the movement of oxygen and CO2 in the systemic circuit

Answer 16

oxygen leaves blood

CO2 enters blood

Question 17

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

Answer 17

oxygen

Question 18

which gas, CO2 or oxygen is more diffusible?

Answer 18

CO2