Application Problem #8: Respiratory Chemoreceptors

hypoxia

lack of adequate O2 -> suffocation

lab values in manure pit

-O2, normal pH, normal CO2

normal CO2 in manure pit b/c

space large enough that CO2 was not reinspired

no realization of hypoxia in manure pit b/c

pH and CO2 chemoreceptors were NOT triggered b/c values normal

lab values in astronauts

normal O2, but +CO2 -> -pH

+CO2 in Apollo 13 b/c

space so small that CO2 was reinspired

false hypoxia in astronauts b/c

pH and CO2 chemoreceptors WERE triggered b/c values abnormal

astronauts' false hypoxia resolution

filter CO2 from their air

lab values of pilot @ high-altitude in non-pressurized cabin w/mask on but O2 off

-O2, normal pH, normal CO2

normal CO2 in cabin b/c

mask kept CO2 from being reinspired

no realization of hypoxia in cabin b/c

pH and CO2 chemoreceptors were NOT triggered b/c values normal

s/s hypoxia

mental problems, euphoria, etc.

pilots trained to recognize s/s