overview of the respiratory system Flashcards

1
Q

what is the respiratory tract divided into

A
  • upper respiratory tract

- lower respiratory tract

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what does the upper respiratory tract

A

nose, nasopharynx, pharynx and larynx

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what does the lower respiratory tract consist of

A

tracheae, lungs, Bronchi, alveoli

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what are the primary functions of the respiratory tract

A

a) exchange oxygen and carbon dioxide between blood and atmosphere
b) for olfaction
c) for production of our voice.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what does the nasal supply contain

A

blood supply and lots of hairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is the main function of the hair and blood supply

A

to warm the air and filter it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what does the blood supply do in the nose

A

ensures inspired air is full saturated with water vapour

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what sinus is involved near the nose

A

sphenoid sinus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is the function of a sinus

A

to lighten the skull and to give the voice some resonance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

how does the larynx contribute to voice

A

controls pitch and volume - strength

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is the larynx supplied with

A

vagal receptors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what also contributes to volume

A

the strength of expiration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what are the two pleuras that each lung is surrounded by

A

outer (parietal) pleura

inner (visceral) pleura

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is the function of the pleural space filled with fluid

A

to reduce friction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

at what level does the trachea end and the bronchi bifurcate

A

at the sternal angle (angle of louis)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

why does inhaled material tend to go to the right lung more than the left

A

because the right primary bronchus is more directly in line with the bronchus and is steeper

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what do the bronchi subdivide into

A

lobar bronchi (R- upper, middle and lower / L - middle and lower)
segmental bronchi
terminal bronchi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what is the difference in structure between bronchi and bronchioles

A

bronchi have cartilage and smooth muscle

bronchioles have smooth muscle only

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

where does the terminal bronchi supply

A

the acinus

20
Q

what is the acinus

A

where branching bronchioles communicate with alveoli

21
Q

what are the large bronchioles responsible for

A

for maintaining airflow. smooth msucle can control blood flow by contracting.

22
Q

what are 95% of the cells in the alveoli

A

Type 1 pneumocytes - have direct contact with pulmonary capillaries

23
Q

what do type II pneumocytes do

A

secrete surfactant

24
Q

what does olfactory mucosa contain

A

highly pseudostratified epithelium, it is ciliated and contains olfactory cells.

25
what is the rest of the nasal cavity lined by
respiratory mucosa - pseudo stratified columnar epithelial cells with cilia and goblet cells.
26
what is beneath the epithelium
the venous plexus
27
what are conducting airways lined with
pseudo stratified in nose and trachea | to simple cuboidal in terminal bronchioles.
28
where are cilia found
as far distally as terminal bronchioles (but number of goblet cells decreases)
29
what is gas exchange to do with
perfusion
30
what happens in normal/quite breathing
- diaphragm flattens - external intercostal muscles contract - volume of thoracic cavity increases - air flows in down the pressure gradient into lungs
31
what muscles in the neck and chest are used in high levels of inspiration
inspiratory muscles
32
for expiratory what muscles are used
internal intercostal muscles and abdominal muscles
33
what is inspiration and expiration normally
``` inspiration = passive expiration = active ```
34
what does inspiration or expiration against abnormal resistance use
accessory muscles e.g. sternocleidomastoid / stellate?
35
what is the anatomical dead space
not all the air reaches the alveoli but remains in the large airways so isnt exchanged
36
what is hypercapnia
when pCO2 in the body rises (alveolar ventilation is reduced in proportion to co2 excretion)
37
what is hypocapnia
when pCO2 in body falls (alveolar ventilation becomes excessive)
38
what is compliance
measure of the ease of lung expansion
39
distensibility of the lungs
elastic properties of the lungs cause them to retract from the cell wall
40
what does the upper part of the lungs being less compliant mean
that lower zones of the lungs receive more ventilation than the ones above - distribution of air in the lungs is uneven
41
total lung capacity =
volume of gas in lung after full inspiration
42
tidal volume =
amount of air that enters and leaves the lungs during normal breathing
43
inspiratory capacity =
max volume of air that can be inhaled at the end of normal expiration = sum of tidal volume and inspiratory reserve volume
44
inspiritory reserve volume
volume of gas within the lungs at the end of expiration.
45
vital capacity
volume of air expelled by a maximum expiration from a portion of full inspiration