respiratory system

Question 1

what is external respiration?

Answer 1

exchange of O2 and CO2 between AIR and BLOOD

Question 2

what is internal respiration?

Answer 2

exchange of O2 and CO2 between BLOOD and CELLS/TISSUES

Question 3

what is cellular respiration?

Answer 3

Production of ATP within cells

Question 4

composition of EXHALED air

Answer 4

O = 21%
C = 0.004%
N =78%
Ar = 1%

Question 5

composition of INHALED air

Answer 5

O = 16%
C = 4%
N = 78%
Ar = 1%

Question 6

4 conditions required for gas exchange

Answer 6

1. concentration gradient to drive diffusion
2. a thin cell membrane
3. a moist surface
4. a high surface area

Question 7

what is the role of a surfactant?

Answer 7

reducing AIR TENSION at the air-liquid interface in the alveoli. it prevents collapsing and ensures efficient gas exchange

Question 8

3 factors of the nasal cavity

Answer 8

1. it FILTERS the air through nose hairs and celia
2. it WARMS UP the air through heat from the surrounding blood vessels
3. it gets MOISTENED by the surface of the air passage

Question 9

what is the function of celia and mucus in the respiratory system?

Answer 9

celia: in charge of keeping the lungs clean of debris and dirt by send it it back to the throat
mucus: traps and transports debris

Question 10

why are women’s voices higher pitched than men’s?

Answer 10

pitch is due to LENGTH, THICKNESS, ELASTICITY, and TENSION. they have longer vocal chords than women and their larynx and vocal chord grows rapidly during puberty.