Computer 22 DATA Table 1 Oz Concentration (%) Tidal volume (L) Breath ?32 1 Aver

Question

Computer 22 DATA Table 1 Oz Concentration (%) Tidal volume (L) Breath ?32 1 Average 112412 DATA ANALYSIS important for this experiment that resting and post-exercise tidal volumes be sim ercise. Is it ilar? 2. Inhaled oxygen should have the same concentration at rest and post-exercise (approximately 21%), yet the peak oxygen concentration values in the post-exercise run never achieve this value. What aspect of the experimental design accounts for this finding? Use the average values for Tidal Volume and ah Concentration(%) from Table 1 to calculate the average O2 consumed pre- and post-exercise per breath and over breaths: 3, the combined 4 ?02 Concentration (%) x Tidal Volume (L)-02 consumed per breath O2 consumed per breath x 4 breaths O2 consumed over that time interval 4. CO2 was not measured. What would you expect the volume of exhaled CO2 to be in this experiment at rest and after exercise? of coL as ol 22-4 Human Physiology with Vernier

Explanation / Answer

1. The differences in the tidal volume will not be an important factor as the uptake of oxygens depends of the tissue metabolism rate and not on the frequency of the breathe.

2. The experimental design does not accounts for the amount of workout or breathing during the excercise. The entire curve shifts downwards during post exercise as CO2 remains in the apparatus as some to the air from it is re-breathe , decreasing the value of oxygen consumed.

3. The O2 consumption for pre exercise is calculated as:

.17%*1.=.17(O2 consumed per breathe)

.17* 4=0.68 (for the combimed 4 breathes)

the O2 consumption for post excercise is calculated as:

.41* 1=0.41 (per breathe )

.41*4=1.64 (for combimed 4 breathes)

4. The volume of CO2 exhaled need to be equal to CO2 inhaled so as to balance the cellular respiration .

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