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Norepinephrine stimulates cravings for carbohydrates, whereas endorphins stimulate cravings for proteins.
Aerobic respiration is more efficient than anaerobic fermentation, but the latter is oxygenindependent
The most abundant nitrogenous waste in blood is urea, which is produced by the combination of ammonia with carbon dioxide.
The absorptive state is regulated mainly by insulin, whereas the postabsorptive state is regulated by multiple hormones.
When a person is active, most of the body heat is generated in the brain, heart, and endocrine glands.
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