If inhalation is not a form of passive diffusion, than what is it?

[drzakisadiq]

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?

 

[jdent]

Active. Think about it you are using energy to inhale the air forcing the gas into blood capillaries in lungs.

 

[appleonius]

exhaling is passive.

a passive form of diffusion is something going from a high concentration to low concentration. i never really thought of breathing as diffusion but more so as a process that can either be active or passive.

 

[excusezmoi]

yup..key points to remember...
Exhalation and Gas exchange are passive.
Inhalation are active.

 

[HoangDDS]

hey I understand that inhalation is active b/c it takes energy to contract the diaphram for you to inhale. But at the alveloar level, the exchange of O2 for CO2, isn't that passive diffusion?

 

[excusezmoi]

Gas exchange according to my notes (kaplan mcat) "occurs by diffusion across these capillary walls and those of the alveoli;" here's the concept why it's passive ..."gases move from regions of HIGER partial pressure to regions of LOWER partial pressure." in short passive 🙂

 

[DentalDeac]

hey I understand that inhalation is active b/c it takes energy to contract the diaphram for you to inhale. But at the alveloar level, the exchange of O2 for CO2, isn't that passive diffusion?

yes you are correct