Ventilatory response to exercise

Question 1

impact of exercise on alveolar O2 and CO2

Answer 1

minimal (indicaating that alveolar ventilation increased in proportion to metabolic rate)

Question 2

impact of lung elastcity at high volumes

Answer 2

less elastic at high volumes - increases in ventilation mostly through respiratory rate at this point (vs tidal volume)

Question 3

ventilatory increase at low workloads primarily via

Answer 3

tidal volume

Question 4

ration decreased as tidal volume increases at low work loads

Answer 4

decreased dead space / tidal volume

Question 5

humans retain arterial blood gas homeostasis up until

Answer 5

60% of max metabolic wait

Question 6

aboe 60% maximal capacity, increased ___

Answer 6

lactic acid production

Question 7

impact of hyperventilation at high work rates

Answer 7

no change in PaO2 (no increase)

Question 8

increase in alveolar to capillary gas exhange indicated by

Answer 8

increase in D_LCO

Question 9

increase in ___-___ difference at high workloads reflects hyperventilation increases ___ which increases ____ to ____ driving pressure and maintains normal PaO2

Answer 9

increase in A-a PO₂difference at high workloads reflects hyperventilation increases **P_AO2 which increases alveolar to capillary **driving pressure and maintains normal PaO2