Question

Which one is not a step in respiration?
a) Pulmonary ventilation
b) Alveolar diffusion of O2 and CO2
c) Transport of gases by blood
d) Utilisation of CO2 by cells for catabolic reactions

Answer 1

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d) Utilisation of CO2 by cells for catabolic reactions

Answer 2

Explanation:

the correct answer is ooption d