ventilation

Question 1

tidal breathing mechanism (pressures)

Answer 1

inspiratory effort → negative pressure causes alveolar pressure to drop (pressure gradient generate flow so air flows in) → air in until pressure balances → remove inspiratory effort → pressure becomes more positive as lungs recoil and compress gas → pushes air out until back to where you were → start and end at functional residual, peak at tidal

Question 2

define pulmonary ventilation (Vpulm)

Answer 2

volume of air inhaled per minute

Question 3

calculate pulmonary ventilation

Answer 3

Vpulm = minute ventilation / VE

Question 4

define alveolar ventilation (Valv)

Answer 4

volume of air reaching the respiratory zone per minute

Question 5

calculate alveolar ventilation

Answer 5

subtract phsyiological dead space from tidal volume