Physiology Quiz 6 (Resipratory) Flashcards Preview

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Flashcards in Physiology Quiz 6 (Resipratory) Deck (33):
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Interpulmonic pressure

Pressure within lungs

1

Intrapleural pressure

Pressure within thoracic cavity

2

Intraplural pressure is always....

Negative

3

Contraction of diaphragm does what

Increase pressure in thoracic cavity and lungs

4

Tidal volume

Volume of air inhaled and exhaled

5

Typical value of tidal volume

500mL; will increase with exercise

6

Dead space

Regions not involved in gas exchange
When Vidal volume is taken in a portion of the air goes to dead space

7

Types of dead space

Anatomic
Physiologic

8

Anatomic dead space

Volume of respiratory tree that does not normally participate in gas exchange which is supplied with air from tidal volume

9

Typical volume of anatomic dead space

150ml

10

Physiologic dead space

Volume in the lung which normally participates in gas exchange that is supplied with air but is not now participating in gas exchange

11

How does physiological dead space occur

Small bronchiole closes off (usually by mucous plug) and area distal to that blockage no longer participates in gas exchange

12

Sigh reflex

Deeper than normal tidal breath, counters atelectasis

13

Atelectasis

Something causing small bronchiole to become closed off

14

What counters atelectasis

Sigh reflex
Exercise with hyperpnea

15

What diseases are associated with atelectasis

COPD
emphysema

16

Inspiratory reserve volume

Maximal volume that can be inhaled at he end of a normal tidal volume

17

Inspiratory reserve volume decreased in what populations

COPD
Smokers
Emphysema
Asthma

18

Expiratory reserve volume

Maximal amount of air that can be exhaled at the end of normal tidal volume

19

Expiratory tidal volume decreased in what populations

COPD
smokers
Asthma

20

What is a more sensitive indicator of pulmonary dysfunction

Expiratory reserve volume

21

What happens to the bronchiole with asthma

Constricte; inhibits air flow

22

What does respiratory bronchiole do

Collapses in forced expiration to not allow air to leave alveolar clusters; happens sooner in emphysema and COPD

23

Eupnea

Quiet breathing at rest

24

Hyperpnea

Increased rate and depth of breathing

25

Vital capacity

Sum of
Inspiratory reserve volume
Expiratory reserve volume
tidal volume

26

Vital capacity is reduced in what populations

COPD
smokers

27

Residual volume

Volume of air that can never be expelled

28

Residual volume is larger in what populations

COPD
smokers

29

Forced exploratory volume

Volume that can be expelled
FEV 1
FEV 2

30

FEV 1

Volume of air that can be expelled during first second (~70% vital capacity)

31

FEV 2

Volume of air that can be expelled during the first 3 sec (~90% vital capacity)

32

Forced expiratory volume is reduced in what populations

COPD
asthma
Smokers