7.3 measuring gas exchange

Question 1

vital capacity

Answer 1

volume of air that can be breathed in when the strongest possible ehalation is followed by the deepest possible intake of breath

Question 2

tidal volume

Answer 2

volume of air that moves into and out of the lungs with every resting breath (increaes with exersise)

Question 3

ventilation rate =

Answer 3

tidal volume dm3 x breathing rate bpm

Question 4

how can we measure ventilation in humans x 3

Answer 4

• peak flow meter- rate at which air is expelled monitor asmatha
• vitalgraphs : produce a graph of how much and how quiclkly air is blown out
• spirometer - measures the different aspects of lung volume and breathing patterns (spinning cylinder and water level )

Question 5

oxygen uptake/comsumtion

Answer 5

the rate at which an organism uses uo O2 dm3 per min