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> It's probably because the
> immersion effect (loss of gravity) increases active
> blood volume (no pooling in lower body), thereby
> sending more blood to the brain. A higher blood 
> volume counters the brain's attempt to choke
> down on blood flow during hyperoxia. Immersion
> diuresis results from the same change -- the
> body perceives the blood volume is too high 
> when gravitational pull is lost. 

Ur.... Gravity is here to stay...... Because you perceive zero gravity due
to neutral buoyancy, does not mean that it's not there, there will still be
blood pooling, and the effects of gravity still exists and still acts on
the blood and body. If zero gravitational pull were not experienced, for
one your weight belt would be ineffective.

Ciao

Dave Nunes
Infoview Client systems



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