lung measurment

Question 1

define breathing rate

Answer 1

number of breaths taken in one minute

Question 2

define tidal volume

Answer 2

volume of air taken in and out with one breath when at rest - usually 0.5 dm3

Question 3

define residual volume

Answer 3

volume of air that remains in the lungs after a force expiration
remains in airways

Question 4

define vital capacity

Answer 4

maximum volume of air that can be moved by the lungs in one breath

Question 5

define total lung capacity

Answer 5

-vital capacity + residual vol

-total amount of air that the lungs contain

Question 6

how do u read the spirometer trace

Answer 6

line down = breathing in

line up = breathing out

Question 7

how does a spirometer work

Answer 7

1)spirometer has an oxygen filled chamber with movable lid, person breaths through tube connected to it
2)lid moves up and down as person breaths in and out
3)pen attached creates a spirometer trace
4)soda lime in the tube absorbs carbon dioxide

Question 8

why does the total volume of gas in chamber decrease over time

Answer 8

not all oxygen is breathed back into it as it is used up in respiration

Question 9

what factors affect peak flow

Answer 9

-height, taller = bigger lungs
-age
-gender
-physical fittness