respiratory mechanisms Flashcards Preview

respiratory system 1 > respiratory mechanisms > Flashcards

Flashcards in respiratory mechanisms Deck (46)
Loading flashcards...
1

respiration has 2 meanings, what are they?

breathing and aerobic metabolism

2

what do lungs bring in?

fresh air rich in oxygen

3

what do lungs expel?

waste CO2

4

what is peripheral circulation?

deoxygenated blood from capillaries to heart

5

what is pulmonary circulation?

deoxygenated blood away from R ventricle to lungs then back to heart as oxygenated blood

6

why is respiratory mechanism important?

understand how lungs work normally and in diseased states

7

what is the route of air flow from external environment to the lungs?

nasal cavity, pharynx, larynx, Trachea, bronchi, lungs, alveoli

8

what is the function of the nasal cavity/paranasal sinuses in respiration?

filter, warm and humidify air

9

what is the function of the pharynx in respiration?

conduct air to larynx

10

what is the function of the larynx in respiration?

protect opening of trachea and contains vocal chords and epiglottis

11

what is the function of the trachea in respiration?

filter air, trap particles in mucus, cartilages keep airway open

12

what is the function of the bronchi in respiration?

same as trachea (filter air, trap particles in mucus)

13

what is the function of the bronchi in respiration?

responsible for air movement, include airway and alveoli

14

what is the function of the alveoli in respiration?

site of gas exchange between air and blood

15

what is the function of the upper airway in relation got respiration?

conduct air to lung, humidify, warm, filter

16

the upper airway to bronchioles is lined by which epithelium?

pseudo-stratified ciliated columnar

17

is quiet inspiration active or passive?

active

18

what happens to the thorax during quiet inspiration?

- diaphragm contracts downwards pushing abdominal contents out
- external intercostal muscles (between ribs) pull ribs out and up
- pleural cavity volume increases
- pressure outside exceeds pressure inside so air flows into lungs

19

what happens to the thorax during quiet expiration?

- due to increased volume of thoracic cavity during inspiration, pressure inside increases, exceeding the pressure outside
- air flows out of lungs and diaphragm and external intercostal relax

20

is quiet expiration active or passive?

passive

21

is strenuous inspiration active or passive?

active

22

is strenuous expiration active or passive?

active

23

internal intercostal muscles are only active during which type of respiration?

forced

24

what happens during strenuous inspiration?

- greater contraction of diaphragm and external intercostal
- inspiratory accessory muscles active (alae nasi, sternocleiodomastoid, genioglossus)

25

what happens during strenuous expiration?

- abdominal muscles contract (rectus abdominus, internal oblique, external oblique, traverse abdominus)
- internal intercostals oppose external intercostals by pushing ribs down and in

26

what is the major respiratory muscle?

diaphragm

27

how are lung pressure and volume related?

inversely

28

what is intrapulmonary pressure?

pressure within the lungs

29

during inspiration, intrapulmonary pressure is?

less than atmospheric (0)

30

during expiration, intrapulmonary pressure is?

greater than atmospheric