24/1/23 exchange surfaces and breathing subtopic test notes

Question 1

Ventilation rate calculation

Answer 1

Ventilation rate calculation = tidal volume x breathing rate

Question 2

Fick’s law

Answer 2

Fick’s law :
Rate of diffusion = (surface area x difference in concentration) / membrane thickness

Question 3

Tidal volume

Answer 3

Tidal volume = volume of air that moves into and out of lungs with each resting breath

Question 4

Vital capacity

Answer 4

Vital capacity = volume of air that can be breathed in when the strongest possible exhalation is followed by strongest inhalation

Question 5

Inspiratory reserve volume

Answer 5

Inspiratory reserve volume = maximum volume of air that you can breathe in and above a normal inhalation

Question 6

Expiratory reserve volume

Answer 6

Expiratory reserve volume = extra amount of air that you can force out your lungs over normal tidal volume

Question 7

Residual volume

Answer 7

Residual volume = volume of air left after the strongest exhale

Question 8

Total lung capacity

Answer 8

Total lung capacity = sum of the vital capacity and the residual volume

Question 9

Ventilation rate definition

Answer 9

Ventilation rate = total volume of air inhaled in one minute

Question 10

How to calculate breathing rate on spirometer graph

Answer 10

Rate - work out gradient = change in Y/change in X

Question 11

Important components of spirometer

Answer 11

-Person’s nose is clipped so air doesnt enter and leave through nose
-Has soda lime to absorb CO2
-Contains pure oxygen for person’s breathing for aerobic respiration
-Healthy person needed