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Flashcards in Unit 4 Deck (42)
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1

What are the muscles of inspiration?

Diaphragm
External intercostal
Sternocleidomatoid
Serratus anterior
Scalenus muscles

2

Muscles of expiration are only needed when? And what are they?

Only needed for forceful expiration

Rectus abdominus, obliques, internal intercostals

3

______ is due to muscle contraction which increases thoracic cage size

Inspiration

4

How do lungs inflate?

The compliant lungs inflate due to the negative pressure in the pleural cavity

5

_______ is due to decreasing thoracic cage size bc of the elasticity of the thoracic soft tissue and the lungs themselves

Expiration

6

___________ pressure oscillates around sero relative to atmospheric pressure

Intrapulmonary pressure

7

When negative, air ______ lungs. When positive, air _____ lungs

Enters; leaves

8

The lowest intrapulmonary pressure is reached ______ into inspiration

Halfway

9

After the lowest intrapulmonary pressure is reached halfway into inspiration, entering the lungs _______ the pressure

Raises

10

The highest intrapulmonary pressure is reached __________

Halfway into expiration

11

_________ is always negative compared to atmospheric pressure, oscillating around -4

Intrapleural pressure (pleural pressure)

12

_________ exerts an expanding effect on the lungs due to lung compliance

Intrapleural pressure

13

______ is the difference between intrapulmonary pressure and intrapleural pressure

Transpulmonary pressure

14

Alveoli contain two type of pneumocytes:
Type 1: _________
Type 2: _______

Type 1 line the alveolar walls (squamous)
Type 2: secrete pulmonary surfactant

15

________ is necessary to keep alveoli inflated

Surfactant

16

Premature babies lack _______ and therefor develop respiratory distress syndrome

Surfactant

17

_______ is a commonly used pulmoary function test

Spirometry

18

______ is normal quiet breathing. Volume of air you breathe in and out

Tidal volume

19

__________ i from top of tidal volume, breathing in until you cannot get anymore

Inspiratory reserve volume

20

________ starts from a normal breath out then try to squeeze every last bit of air out

Expiratory reserve volume

21

____________ the last bit of air that is in your lungs that is always present

Residual volume

22

_________ are the same of more than one pulmonary volume

Capacities

23

What is inspiratory capacity?

Tidal volume + inspiratory reserve volume

24

What is functional residual capacity

Expiratory reserve volume + residual volume

25

How would one calculate vital capacity?

Inspiratory capacity + expiratory reserve volume OR
Tidal volume + inspiratory reserve volume + expiratory reserve volume

26

Minute respiratory volume = _______ X ______

Tidal volume X respiratory rate

27

________ sonsits of air that fill the respiratory passageways tha are not capable of gas exchange with blood

Dead air space

28

Anatomic dead are space is?

Air in trachea, terminal bronchioles

29

Alveolar dead space is ______

Damaged or under perfumed alveoli

30

What is the physiological air space

Sum of the anatomic dead air space and alveolar dead space