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If an individual is eating a diet in which 1/4 of their ATP production is a...

If an individual is eating a diet in which 1/4 of their ATP production is a result of utilizing carbohydrates, 1/4 of their ATP production is a result of metabolizing fats, 1/2 of their ATP production is a result of metabolizing proteins, their cardiac output is 4.5 L/min, and their atreial-venous oxygen difference is 6.0 mL/dL, how much carbon dioxide are they producing?

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Answer #1

Oxidative phosphorylation proceeds with the formation of energy laden molecules ie; carbondioxide and water.

Therefore, Total CO2 production is directly related to VCO2 = R x VO2

where, R is the respiratory quotient varing among 0.7 to1.0 according to the energy intake (ATP) ie 1/4 of the toal diet comsumed . so, 1/4 = 0.25

VO2 is, as mentioned above arterial venous oxygen difference = 6.0ml/dl

therefore, VCO2 = 0.25 x 6.0

= 1.5 ml/dl

ie; VO2 : VCO2 = 6.0 : 1.5.

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