A) Energy is subject to an input-output balance similar to that for water.
B) An example of internal work is the energy expended by muscles to lift a heavy object.
C) Almost 75% of nutrient energy is lost as heat and not used to do work.
D) Energy is normally expressed in terms of heat energy.
E) none of these.

A) chemical energy in ATP and kinetic energy of locomotion
B) standard metabolic rate and resting metabolic rate
C) basal metabolic rate and thermal neutral zone
D) field metabolic rate and average metabolic expenditure over time
E) endotherms and amphibians

A) are measured during periods of aerobic activity.
B) involve the use of treadmills.
C) are an indicator of an animal's activity capacity.
D) are the ratio of metabolic rate to SMR.
E) two of these.