At one point, scientists believed that homeostasis and “set point theory” controlled the weight of adults, such that the same body weight of an adult would be maintained over long periods of time. However, the settling point theory contends that no such predetermined weights exist for adults. This theory also contends that there are no internal, biological mechanisms that work to control the body weights of adults. It argues, instead, that many environmental factors affect body weight, including, but not limited to, the amount of food adults eat, the amount of energy expended to compensate for the amount of food/energy they have taken in, and their metabolic rates.

Make sure you have read the text and watched the videos assigned in this module before completing in this activity.
•Define and explain all three of the following concepts: homeostasis, “set point theory,” and settling point theory..
•Explain the similarities between homeostasis and “set point theory.” Explain any differences between homeostasis and “set point theory.”.
•Explain how settling point theory is different from both homeostasis and “set point theory.” Why did scientists believe that these factors or mechanisms controlled the body weight of adults in the past?.

Write a 500 word paper to address the questions above. You are required to cite your sources in the body of your text properly, include a reference page, and use APA style.