Lung Physio I Flashcards Preview

A&P 3.1 > Lung Physio I > Flashcards

Flashcards in Lung Physio I Deck (33):
1

What is intrapulmonary pressure?

Pressure in the alveoli (lung)

2

What is intrapleural pressure?

Pressure in pleural space

3

What is atmospheric pressure?

760 mmHg

4

At rest, what is the intrapulmonary pressure? Intrapleural pressure?

760 mmHg
756 mmHg

5

At inspiration, what is the intrapulmonary pressure? Intrapleural pressure?

757 mmHg
754 mmHg

6

At expiration, what is the intrapulmonary pressure? Intrapleural pressure?

763 mmHg
756 mmHg

7

What is transpulmonary pressure and why is it important?

The transpulmonary pressure, which keeps the lung from collapsing is 757-754= 3 mmHg. The lungs want to recoil and the surface tension of the alveolar fluid keeps the lung from collapsing.

8

What is Tidal Volume?

TV- 500 mL
Normal quiet breathing/ normal adult inspiration OR expiration

9

What is inspiratory reserve volume?

IRV- 3000mL
Amount of air in excess of tidal volume that can be inhaled with maximum effort

10

What is expiratory reserve volume?

ERV- 1200mL
Amount of air in excess of tidal volume that can be exhaled with maximum effort

11

What is residual volume?

RV- 1200mL
Amount of air remaining in the lungs after maximal expiration

12

What does residual volume do?

Keeps alveoli inflated and mixes with fresh air from next breath

13

What is vital capacity?

VC- 4700mL
The amount of air that can be inhaled and exhaled with maximum effort

14

What is the formula for determining vital capacity?

VC= TV + IRV + ERV

15

What is total lung capacity?

TLC- 5900 mL
Maximum amount of air that the lungs can contain

16

What is the formula for determining total lung capacity?

TLC = VC + RV

17

What is functional reserve capacity?

FRC- 2400 mL
The amount of air remaining in lungs after normal tidal respiration

18

What is the formula for determining functional reserve capacity?

FRC = RV + ERV

19

What is the definition of dead air space?

Amount of air that never reaches the alveoli- fills conducting portion

20

Hos is the volume of dead air space determined?

350 mL is exchangeable of the 500 mL of tidal volume
500 ml(TV) - 350 mL = 150 mL = volume of air in conducting portion

21

What are 2 advantages of dead air space?

Keeps us safe from toxic air a little longer
Prevents wide fluctuations of O2/CO2 levels

22

What is the minute respiratory volume?

The amount of air inhaled per minute

23

How is minute respiratory volume determined?

TV x RR = MRV
500 ml x 12 breaths per minute = ~6L

24

What is apnea?

Cessation of breathing

25

What is dyspnea?

Labored or gasping breathing (S.O.B.)

26

What is the medical term for normal breathing?

Eupnea

27

What is the medical term for normal breathing?

Eupnea

28

______ results from bronchial constriction and ↑ airway resistance

asthma

29

What 4 things can cause asthma?

Excess mucus secretions
Inflammation of bronchioles
Constriction of smooth muscle around bronchioles
Can be provoked by an allergic reaction

30

What is pneumonia?

Respiratory membrane thickened with edema, fluid seeps out into alveoli

31

What is emphysema?

Alveolar wall destruction
Reduced surface area for gas exchange

32

What is pulmonary fibrosis?

Replacement of lung tissue with (inelastic) fibrous CT

33

What is black lung?

Any lung disease that develops from inhaling coal dust