In an Experiment in Which an Animal Is Injected with Deuterium

question 29

Multiple Choice

In an experiment in which an animal is injected with deuterium and oxygen-18 (D₂¹⁸O method) and then released into the wild, which of the following trends would you expect to see from measurements taken after a period of rest and again after a period of exercise?

• A) CO₂ production will be higher during exercise than at rest.
• B) CO₂ production will be equal during exercise and at rest.
• C) O₂ production will be higher during exercise than at rest.
• D) O₂ production will be equal during exercise than at rest.

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