9700/13 Biology Oct Nov 2021 Online Test | Cambridge AS and A Level MCQ
In some cases where a person has lung disease, the partial pressure of oxygen in the pulmonary veins is less than the partial pressure of oxygen in the alveoli.
Which would contribute to the description above?
1) A high proportion of alveoli are collapsed and do not have enough alveolar capillaries.
2) The degree of alveolar ventilation is too low for the cardiac output…