Although Cara has been obese for as long as she can remember,she is determined to lose excess body weight with a low-calorie diet.Cara is most likely to have difficulty becoming and staying thin because

A) she may have a higher-than-average set point for body weight.
B) low-calorie diets trigger increased secretions of PYY.
C) lean tissue is maintained by fewer calories than is fat tissue.
D) her resting metabolic rate will increase and prompt her to overeat.

Question

Haseeb Ahmad · Accepted Answer

Final Answer : A, Explanation :  The set point theory suggests that the body has a predetermined weight range that it strives to maintain, and it can be difficult to lose weight and keep it off if that set point is higher than desired. This may be especially true for someone like Cara who has been obese for a long time. The other options are not relevant to the question or are incorrect; for example, low-calorie diets actually reduce PYY secretion, not increase it, and higher amounts of lean tissue generally require more calories to maintain than fat tissue.

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