What is the evolutionary explanation of obesity?
The thrifty and drifty genotype hypotheses explain that the genetic susceptibility to obesity is due to heritable factors that are the result of positive selection pressure or an absence of positive selection pressure, respectively, in the course of human evolution.
What is the evolutionary perspective?
The evolutionary perspective draws on Darwinian principles of evolution and natural selection to explain how gender differences evolve. Individuals who are fertile, live long enough to reproduce, and are able to raise their offspring will successfully pass on their characteristics to the next generation.
What is evolutionary theory in social psychology?
The evolutionary theory frame covers applications of natural selection to the ecological behavior of individuals and groups or populations, including the demographic and social epidemiology of pathogenic disease. From: International Encyclopedia of the Social & Behavioral Sciences, 2001.
What is the origin of obesity?
Abstract. Although it appeared relatively suddenly, the current obesity epidemic – largely manifest in industrialized societies but now spreading to the rest of the world – is the result of interaction between human biology and human culture over the long period of human evolution.
How obesity is related to natural selection explain?
Worldwide rise of obesity may be partly related to the relaxation of natural selection in the last few generations. Accumulation of mutations affecting metabolism towards excessive fat deposition is suggested to be a result of less purging selection.
What is the hypothesis for obesity?
As stated previously, the CICO hypothesis stipulates that weight gain occurs because caloric intake exceeds energy expenditure, or, in other words, that overcomsumption and underactivity are the obvious causes of obesity.
What is evolutionary perspective quizlet?
evolutionary psychology. emphasizes adaptation, reproduction and survival of the fittest in shaping behavior. evolution can explain both human and physical features. some evolved mechanisms of adaptation not compatible with modern society. *weight gain and loss.
What are some examples of evolutionary perspective?
Every so often the lead bird will switch out and another will take their place. These actions repeat every year when the weather starts to get cold. This is an example of the way that the evolutionary perspective applies to animals. Likely, no one had to teach these birds that they need to fly south for the winter.
What are biological factors of obesity?
Many factors influence body weight-genes, though the effect is small, and heredity is not destiny; prenatal and early life influences; poor diets; too much television watching; too little physical activity and sleep; and our food and physical activity environment.
What are two of the current competing hypotheses about causes of the obesity?
Since the 1950s, conventional wisdom on obesity has been that it is caused by a positive energy balance — in other words we get fat because we overeat. The alternative hypothesis — that obesity is a hormonal or regulatory disorder — was dismissed after the second world war as being unworthy of serious attention.
What does the evolutionary approach emphasize quizlet?
emphasizes adaptation, reproduction and survival of the fittest in shaping behavior.
What does evolutionary psychology study quizlet?
seeks to study the ultimate biological causes of behavior. Just as genetic traits have evolved and adapted over time, psychological traits can also evolve and be determined through natural selection.
Which of the following best describes the theory of evolution?
Which best describes evolutionary theory? It is based on the idea that all life is related. It states that organisms have become less complex over time.
What are 3 theories of evolution?
The three theories of evolution are: Theory of inheritance of acquired characters – Lamarck. Theory of natural selection – Darwin. Mutation theory – De Vries.
What economic environmental and biological factors have driven the increase in obesity?
Some of the environmental conditions that lead to obesity are physical activity, alcohol consumption, socioeconomic status, parent feeding behavior, and diet. Interestingly, some of these environmental conditions are shared with neurodegenerative and neurodevelopmental diseases.
Which of the following best describes research findings on the genetics of obesity?
Which of the following best describes research findings on the genetics of obesity? Twin studies support genetic influence, but the environment plays a substantial role.