Atwater and Rosa Built the First Human Calorimeter in the 1890s

question 133

Multiple Choice

Atwater and Rosa built the first human calorimeter in the 1890s. After measuring the energy expenditure and food and oxygen intake of humans, they made a key discovery about the transformation of matter and energy in the human body. What discovery did they make?

• A) Amazingly, humans exert more energy than they take in.
• B) Humans are inefficient and don't exert as much energy as they take in.
• C) The confirmation of the conservation of energy in human nutrition and energy output.
• D) Direct calorimetry is the gold standard for accurate measurement.
• E) All of the above

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Definitions:

MC (Marginal Cost)

The additional cost incurred in producing one more unit of a good or service.

Downward-Sloping Demand

A representation of the relationship between price and quantity demanded, indicating that as price decreases, demand increases.

Reasonable Substitutes

Alternative products or services that can satisfactorily replace others, meeting the same needs or wants.