Carbon-13 is a non-radioactive isotope of carbon that is safe for humans to ingest.This isotope can be identified and quantified using an analytical instrument called a mass spectrometer.The figure below shows results of such an analysis of the fate of ¹³C-labeled alanine given orally to human volunteers just before they began intensive and prolonged exercise. From the results shown, it can be concluded that the majority of alanine ingested just before exercise is used as a(n) _______ source.

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The Answer of Carbon-13 is a non-radioactive isotope of carbon that is safe for humans to ingest.This isotope can be identified and quantified using an analytical instrument called a mass spectrometer.The figure below shows results of such an analysis of the fate of ¹³C-labeled alanine given orally to human volunteers just before they began intensive and prolonged exercise. From the results shown, it can be concluded that the majority of alanine ingested just before exercise is used as a(n) _______ source.

Carbon-13 Is a Non-Radioactive Isotope of Carbon That Is Safe