9- gas exchange Flashcards
(3 cards)
1
Q
role of glands in maintaining health of gas exchange system
A
- secrete mucus
- mucus traps pathogens
- cilia sweeps mucus to back of throat
2
Q
how thicker mucus interferes with healthy gas exchange surfaces in lungs
A
- cilia have difficulty moving mucus, so pathogens build up
higher risk of infection
3
Q
how does O2 move between alveoli and blood
A
O2 diffuses from atmospheric air in alevoili cavity across alveoli epithelium into blood in pulmonary capillaries.
binds to Hb in RBCs
