A) only heat released from body in sealed chamber
B) only oxygen consumed by body in sealed chamber
C) only carbon dioxide produced by body in sealed chamber
D) heat released from body in sealed chamber, oxygen consumed by body in sealed chamber, and carbon dioxide produced by body in sealed chamber
E) None of these answers are correct.

A) sleeping.
B) resting after a large meal.
C) resting after a 12-hour fast.

A) first law of thermodynamics.
B) second law of thermodynamics.
C) law of mass balance.