HSC 308 Final Exam Questions and
Answers
Describe how air temperature and humidity changes as altitude increases and what the
potential effect on performance would be. - Answer-- Air temp: Temp decreases 1 degree
Celsius per every 150 meter ascent. In an athlete's situation exercising at a high...
- (a-v)O2 difference decreases due to the drop in PO2. This directly decreases O2 diffusion
throughout the body. CO also decrease at elevation because of the rapid dehydration that
lowers stroke volume
- Also, heart rate will decrease at max due to the decreases responsiveness of the SNS
What is the advantage and possible disadvantage of increased reliance on glucose versus fat
during acute altitude exposure? - Answer✔✔-- One advantage would be that the breakdown of
glucose is much quicker than fat. Also, for every Liter of O2 consumed, our body can create a lot
more energy using glucose than it can fat.
- One disadvantage is that we are more likely to run out of the available glucose since it is being
used more frequently.
What is the lactate paradox of altitude exposure? - Answer✔✔-Increased anaerobic metabolism
leads to increased lactic acid
- Lactic acid production decreases over time
- No explanation for lactate paradox
Why does dehydration occur faster at altitude? - Answer✔✔-- Water loss through skin,
kidneys/urine
- Exacerbated by sweating with exercise
- Must consume ~3 to 5 L fluid/day
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