Behavior is biologically determined by physiological processes such as the nervous system neurotransmitters (e.g. serotonin) and the endocrine system (hormones e.g. adrenalin increases heart rate and fight or flight response)
"All that is psychological is first physiological" (Sperry)
Patterns of behavior can be inherited through genetics
Some patterns of behavior may be a result of natural selection
The study of animals can inform our understanding of human behavior
Psychologists use rats and monkeys for a lot of research but the results cannot always be generalized to humans
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