Set-point theory postulates that every individual has a set (i.e., fixed) and genetically predetermined body weight.

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An individual's body weight is influenced by a complex interplay of factors. These include biological elements like gene-environment interactions and metabolic rate, behavioral aspects such as the balance between calories consumed and expended, and broader societal factors like socioeconomic status and the physical environment.

Factors Determining Body Weight

Spielman, R. M., Jenkins, W. J., & Lovett, M. D. (2020, April 22). Psychology (2nd ed.). OpenStax. https://openstax.org/books/psychology-2e/pages/1-introduction

OpenStax Psychology (2nd ed.) Textbook

Set-Point Theory 

Metabolic rate is the rate at which an individual's body is expending energy at a given time. Not one person has the exact metabolic rate (i.e., metabolic rates are super variable).

Metabolic Rate

The relationship between caloric intake and expenditure directly impacts body weight. When caloric consumption is greater than the energy used, the body stores the surplus energy as fat. Conversely, when energy expenditure surpasses caloric intake, the body converts stored fat into energy.

Caloric Balance and Body Weight

Read the following scenario. Based on the information provided, analyze the complex interplay of factors contributing to the individual's body weight. Identify and explain at least one biological, one behavioral, and one societal factor.

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