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Flashcards in Respiratory Physiology Deck (41):
0

volume inspired or expired with each normal breath

tidal volume

1

volume can be inspired over and above the tidal volume

inspiratory reserve volume

2

volume that can be expired after the expiration of a tidal volume

expiratory reserve volume

3

volume that remains in the lungs after a maximal expiration

residual volume

4

which of the lung volumes and capacities cannot be measured by spirometry?

residual volume
total lung capacity

5

sum of tidal volume and inspiratory reserve volume

inspiratory capacity

6

sum of expiratory reserve volume and residual volume

functional residual capacity

7

volume of air that can be forcibly expired after a maximal inspiration

vital capacity

8

Determination of residual volume

functional residual capacity - expiratory reserve volume

9

equilibrium/resting volume of lung

functional residual capacity

10

FEV1/FVC: obstructive lung disease

decreased

11

FEV1/FVC: restrictive lung disease

normal or increased

12

Gas exchange: N2O

perfusion-limited exchange

13

Gas exchange: oxygen - normal conditions

perfusion-limited exchange

14

Gas exchange: CO

diffusion-limited exchange

15

Gas exchange: oxygen - strenuous exchange

diffusion-limited exchange

16

Gas exchange: CO2

perfusion-limited exchange

17

Gas exchange: CO2

perfusion-limited exchange

18

Where is perfusion highest/lowest?

Perfusion is lowest at apex (zone 1)
Perfusion is highest at base (zone 3)

19

Where is ventillation highest?

Base

20

Where is V/Q ratio highest/lowest?

V/Q ratio is highest at apex
V/Q ratio is lowest at base

21

Zone 1

alveolar>arterial>venous

22

Zone 2

arterial>alveolar>venous

23

Zone 3

arterial>venous>alveolar

24

What is the response of the lungs to hypoxia?

Hypoxic vasoconstriction

25

Medullary response center

reticular formation

26

Medullary response center: inspiratory center, basic rhythm

dorsal respiratory group

27

Medullary response center: expiration, overdrive mechanism during exercise, forced inspiration and expiration

ventral respiratory group

28

Apneustic center

lower pons

29

Pneumotaxic center

upper pons

30

Which pontine center stimulates/inhibits inspiration?

stimulates inspiration-apneustic center
inhibits inspiration-pneumotaxic center

31

Majority of bronchial circulation returns to right atrium or left atrium?

right atrium - 1/3
left atrium - 2/3

32

normal inspiration is active or passive?

active

33

normal expiration is active or passive?

passive

34

What muscles are involved in quiet breathing?

only the diaphragm

35

Emphysema:
compliance
elasticity

compliance increased
elasticity decreased

36

Fibrosis:
compliance
elasticity

compliance decreased
elasticity increased

37

active component of surfactant

dipalmitoylphosphatidylcholine/lecitin

38

lung zone 1: alveolar capillary pressure vs alveolar air pressue

lung zone 1: alveolar capillary pressure IS LESS THAN alveolar air pressue

39

lung zone 2: alveolar capillary pressure vs alveolar air pressue

lung zone 2: alveolar capillary pressure IS GREATER THAN alveolar air pressue DURING SYSTOLE

40

lung zone 3: alveolar capillary pressure vs alveolar air pressue

lung zone 3: alveolar capillary pressure IS GREATER THAN alveolar air pressue