If the pulmonary artery have higher glucose concentration than the pulmonary vein, does it mean glucose will be consumed during gas exchange?

That confused me because gas exchange is something like diffusion and shouldn't consume any glucose

  • $\begingroup$ So what about the red cells flowing in the pulmonary artery? And its endothelial cells? $\endgroup$ Commented Feb 14, 2018 at 12:14
  • $\begingroup$ @GrahamChiu So during the gas exchange, red cells will proceed cellular respiration as soon as it absorb oxygen? $\endgroup$
    – David
    Commented Feb 14, 2018 at 12:39
  • $\begingroup$ I didn't say that $\endgroup$ Commented Feb 14, 2018 at 12:41
  • $\begingroup$ I said that because glucose will be decomposed in order to proceed cellular respiration. Edit: I didn't know that red cells don't have mitochondria $\endgroup$
    – David
    Commented Feb 14, 2018 at 12:46
  • $\begingroup$ biology.stackexchange.com/a/34753/22415 $\endgroup$ Commented Feb 14, 2018 at 14:22

1 Answer 1


Gas exchange doesn't but the cells of the tissue it occurs in do consume glucose, even the cells in the walls of the artery will consume some. The cells in the lungs still need to be fed and only one of those two vessels has flow going into the tissue so it is the one that has to carry that glucose into the tissue.


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