Pulmo Physio Flashcards
explain the pathway of air
external nares - nasopharynx - oropharynx
it filters inhaled air
nose hairs - 10-3 micrometers
why is air humidified
dry air damages - nasopharynx humidifies nd warms
why is swimming reco for asthmatics
1 foot above water - vv humidified air - less attacks
why is the nose an area of high infection
bc of high sebum
why is nose vv sensitive part
cribiform plate is perforated passage of olfactory n - access to CNS - meningitis
what is the movement of cilia
beat down - orad - toward mouth
what are the 2 types of fluid on top of cilia
Gel layer - mucus, sticky one; bottom
Sol layer - water component; top
exp how cilia works
filters 3-0.3 micrometer - particles caught in sol layer - moved to orad - spit/swallow
what happens to sol layer when we have coughs or colds
lessened nd gel becomes more viscous - difficulty to move upward - = cough - water to replenish sol
what happens to cilia in chronic smokers
bc cuboidal - no cilia - sol nd gel are stuck - smokers cough
why c shaped cartilage ng trachea
for esophagus to prevent collapse
why is cricoid full circle
prevents excessive movement when labored breathing
right vs left bronchioles
right more vertical than left - debris get dislodged more - infection - pneumonia
how many generations are there
23
what are the diff gens
1-17 - conducting zone
18-19 - transition zone
20-23 - respi zone
cough reflex is until what zone lng
7
what are the 3 types of alveolar cells
type 1 - primary pneumocytes
type 2 - surfactant secreting
macrophages
what is the impotance of surfactants
reduces surface tension - prevents collapse of alveolus - easy to inflate
how nicotine affects the lungs
gets dissolved in fluid of alveolus - harder for o2 - cyanotic
how many alveolocapillary membrane layers
6 layers
how thick is respiratory membrane
0.5 micrometer
piston action
up down of diaghpraghm
bucket handle effect
external itercostal causs ribs to flare out - inc chest diameter
