Why does most people's weight remain stable over time?
Scientists have long suspected that a complex signaling system regulating body weight exists in humans. To test this theory, researchers observed weight gain and weight loss cycles in mice. When food-restricted, mice lost weight. When taken off food restriction, the mice increased their food consumption and soon returned to their original weight. Once the mice returned to their original weight, their consumption dropped off. This phenomenon was termed the set point theory of body regulation. Adipose tissue is now known to be a very active tissue that responds to factors circulating in the blood and communicated to the brain. When adipose tissue increases beyond a "set point" in humans, it is believed that a signal causes food intake to decrease and/or energy expenditure to increase to promote weight loss. On the other hand, if adipose tissue stores decrease below a "set point," food intake increases and energy expenditure decreases, favoring weight gain. Ultimately, body weight is set and remains relatively stable.
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A) skinfold test B) waist-to-hip ratio C) body mass index D) dual energy X-ray absorptiometry
Consuming nutrient-dense foods can help control one's kcalorie intake
a. True b. False Indicate whether the statement is true or false
One of the easiest and most effective ways to prevent foodborne illnesses is to
A) check food's smell, color, and appearance before purchasing it. B) avoid eating away from home. C) consistently wash hands before and after handling food. D) buy meats and produce only from well-known, reliable retail outlets.
Explain the concepts and dietary practices associated with the macrobiotic diet