BLM 11-2 The Air You Breathe Flashcards
1
Q
what does the nose provide
A
-passageway for the entrance of air
2
Q
air is what in the nasal cavity
A
-warm, moist, filtered
3
Q
what special cells/structures are present in the nasal cavity that allow for these functions (4)
A
- hair
- cilia
- mucous producing cells
- rich supply of blood
4
Q
when does a person breathe with the mouth instead of the nose
A
- when O2 supply depleted, breathing rate increases, larger volume of air can by inhaled from the mouth
- when nasal passageway blocked (cold, congestion)
- mouth provides an alternate air passageway
5
Q
how is the air within the trachea different in “mouth breathing” and “nose breathing”
A
- “mouth breathing” air contains pollution or particles because its not filtered by hairs or cilia
- “mouth breathing” air lower in temp and less moist
6
Q
what are the advantages of breathing via the nose
A
- increased filtration if breathing by nose
- greater chance to warm and moisten the air (improve diffusion rate)
7
Q
what are the disadvantages of breathing via the nose
A
-less air comes in
8
Q
what are the advantages of breathing via the mouth
A
- provides alternate pathway when breathing through nose not possible
- allows for greater intake of air when necessary
9
Q
what are the disadvantages of breathing via the mouth
A
- air contains more pollution/particles bc not filtered by hair/cilia
- lower in temp
- less moist
10
Q
what is the function of the epiglottis
A
- trapdoor that prevents food or liquids from enterring trachea/lungs
- not possible to swallow and breathe at the same time as epiglottis closes over the trachea when you swallow
11
Q
how does coughing and sneezing protect your respiratory system
A
- coughing: reflex triggered, means for removing irritants
- sneezing: the air rushes out at a very fast speed which quickly removed dust debris slowly gathered by cilia and mucous
