Quiz - 12 - Diving Knowledge Workbook - Diving Physiology

[Pedro Burrito]

From the Diving Physiology Section of the PADI Diving Knowledge Workbook Version 2.02 © PADI 2009:

2.4 Question 2

Hypoxia results when the diver's carbon dioxide level cannot accumulate to a level high enough to stimulate breathing before the tissues consume the available oxygen.

a. True

b. False

I will post a daily question from my exams to help newer divers and to encourage more experienced divers to interact gracefully and helpfully with the newer divers.

Reminder - this is a post in the Basic Forum and it is a green zone. Please be nice and on topic.

Thank you for your patience while we try to give people something to discuss other than Covid-19 and/or Politics. I will post the answer covered by the spoiler tag later today.

 

[Aviyes]

Wow. I had to dig for that one. Not a fan of the wording, "Hypoxia results..."

Spoiler

as it's not the only way Hypoxia can occur when diving. But, I guess when we are talking OW courses that is the explanation for the dangers of hyperventilating underwater.

 

[Angelo Farina]

Wow. I had to dig for that one. Not a fan of the wording, "Hypoxia results..."

Spoiler

as it's not the only way Hypoxia can occur when diving. But, I guess when we are talking OW courses that is the explanation for the dangers of hyperventilating underwater.

I think the questions refers to free diving...
It describes what happened to me twice. Then, after passing out the second time, I gave up free diving! TOO DANGEROUS...
I do not see any way that you can get an hypoxia while diving in open circuit with air or Nitrox.
Instead, hypoxia was a typical risk of using a CC rebreather, which was the device we mostly used during my initial training in 1975.

 

[TMHeimer]

Right. I can't recall reading about actual hypoxia while scuba diving, only while freediving. Let's see if it meant freediving. I wonder if it is technically possible to occur while on open circuit scuba?

 

[Akimbo]

Sadly, I have managed to discover a LOT of different ways to experience hypoxia -- freediving, rebreathers, and saturation diving.

 

[Dizzi Lizzi]

I think I vaguely remember this from nursing school...something about C02 drive

 

[HKGuns]

Looks like I am with the large minority on this one.

 

[Mike1967]

I can't recall reading about actual hypoxia while scuba diving, only while freediving.

I just finished the TDI Advanced Nitrox theory last night, it's in there. There's even a question about it in the final exam

 

[Angelo Farina]

I just finished the TDI Advanced Nitrox theory last night, it's in there. There's even a question about it in the final exam

So, one can get hypoxia while breathing Nitrox in open circuit? This is something I really did not know...

 

[TMHeimer]

So, one can get hypoxia while breathing Nitrox in open circuit? This is something I really did not know...

Only thing I can think of is someone may be breathing excessively, perhaps in a current or during panic and then ascend?