Physiology: pulmonary & alveolar ventilation Flashcards
what is pulmonary ventilation
the volume of air breathed in and out every minute
what is alveolar ventilation
the volume of air exchanged between the blood and the alveoli per minute
(more important than pulmonary)
what is anatomical dead space
some inspired air remains in the airways where it is not available for gas exchange, this is anatomical dead space
how does anatomical dead space effect pulmonary and alveolar ventilation
it means alveolar ventilation is less than pulmonary, because not all inspired air is used for gas exchange
how is pulmonary ventilation calculated
tidal volume x respiratory rate
how is alveolar ventilation calculated
(tidal volume - dead space volume) x respiratory rate
how is pulmonary ventilation increased(e.g. during exercise)
by increasing depth(tidal volume) and rate of breathing
which is the most effective way of increasing pulmonary ventilation and why
to increase depth of breathing, because you increase the alveolar ventilation as well as pulmonary
