Questions : 1. What is the normal percentage of (a) oxygen, (b) nitrogen, and (c

Question

Questions:

1. What is the normal percentage of (a) oxygen, (b) nitrogen, and (c) carbon dioxide in the atmosphere?

2. What are the partial pressures (for dry air at sea level) of (a) oxygen, and (b) nitrogen ?

3. How are we measuring VO2 in the lab? Explain briefly the physiological significance of VO2 measurements.

4. How are we measuring VCO2 in the lab? Explain briefly the physiological significance of VCO2 measurements.

5.   What is VO2 max? What is the purpose of determining VO2 max for an individual?

Explanation / Answer

1) the normal % of gases present in the air are (a) Oxygen - 21%,, (b) nitrogen - 78% (c) CO2- 0.03%..!!

2) the partial pressure of oxygen In air is 160 mm of mercury..

The partial pressure of nitrogen is 0.78 atm.!!

3) For the technically-inclined, the units are milliliters of oxygen per minute per kilogram of body weight (ml/min/kg). As an added bonus, almost any lab that does VO2 max testing will measure your heart rate at the same time, so you'll find out your maximum heart rate, too.

5) VO2 max, or maximal oxygen uptake, is one factor that can determine an athlete's capacity to perform sustained exercise and is linked to aerobic endurance. VO2 max refers to the maximum amount of oxygen that an individual can utilize during intense or maximal exercise.

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