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Body weight is stable when average daily energy intake and output are equal


Gut-brain peptides are secreted by the brain and target the gastrointestinal tract.


Norepinephrine stimulates cravings for carbohydrates, whereas endorphins stimulate cravings for proteins.


Aerobic respiration is more efficient than anaerobic fermentation, but the latter is oxygenindependent


Glucose in excess of the body's immediate needs is usually converted to protein.


Both glycogenesis and gluconeogenesis are examples of catabolism.


Most body fat in overweight people is stored in the integumentary system.


Consumption of excess calories during adulthood causes adipocytes to multiply.


The most abundant nitrogenous waste in blood is urea, which is produced by the combination of ammonia with carbon dioxide.


The absorptive state lasts about fifteen minutes after a meal.


The absorptive state is regulated mainly by insulin, whereas the postabsorptive state is regulated by multiple hormones.


Mental state does not affect metabolic rate.


When a person is active, most of the body heat is generated in the brain, heart, and endocrine glands.


Hypothermia may be fatal if the core body temperature reaches 37°C or lower.


The heat-promoting center is located in the hypothalamus, which triggers shivering.

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