Protein Intake: 95g 24hr Urinary Urea Nitrogen = 15g Calculate the Nitrogen balance formula - Nitrogen Balance = Nitrogen intake – Nitrogen losses Nitrogen intake = Protein intake (g/day) / 6.25 Nitrogen losses = Urinary Urea Nitrogen (g/day) + 4g
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Step 1
The formula for Nitrogen intake is Protein intake (g/day) / 6.25. Given that the Protein intake is 95g, we substitute this value into the formula. Nitrogen intake = 95g / 6.25 Show more…
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Your body deals with excess nitrogen by excreting it in the form of urea, $\mathrm{NH}_{2} \mathrm{CONH}_{2}$. The reaction producing it is the combination of arginine $\left(\mathrm{C}_{6} \mathrm{H}_{14} \mathrm{N}_{4} \mathrm{O}_{2}\right)$ with water to give urea and ornithine $\left(\mathrm{C}_{5} \mathrm{H}_{12} \mathrm{N}_{2} \mathrm{O}_{2}\right)$ $\mathrm{C}_{6} \mathrm{H}_{14} \mathrm{N}_{4} \mathrm{O}_{2}+\mathrm{H}_{2} \mathrm{O} \longrightarrow \mathrm{NH}_{2} \mathrm{CONH}_{2}+\mathrm{C}_{5} \mathrm{H}_{12} \mathrm{N}_{2} \mathrm{O}_{2}$ Arginine Urea Ornithine If you excrete 95 mg of urea, what mass of arginine must have been used? What mass of ornithine must have been produced?
an individual consumes 40g of test protein X and loses 3g nitrogen in the feces, and 3g nitrogen in their urine. then when on a nitrogen free diet, they lose 0.5g nitrogen in the feces and 1.5g nitrogen in their urine. What is the biological value of test protein X?
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The human body excretes nitrogen in the form of urea, $\mathrm{NH}_{2} \mathrm{CONH}_{2} .$ The key step in its biochemical formation is the reaction of water with arginine to produce urea and ornithine: (a) What is the mass $\%$ of nitrogen in urea, in arginine, and in ornithine? (b) How many grams of nitrogen can be excreted as urea when 135.2 $\mathrm{g}$ of ornithine is produced?
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