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Heredity and Hormones

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Heredity and Hormones

BEH/225
April 12, 2011

Heredity and Hormones
Human behavior can be affected by many things. Human behavior though is more influenced by hormones than heredity. Genes do not directly cause behavior. Genes do affect the development and operation of the nervous system and the endocrine system which influence the likelihood of certain behavior (Morris & Maisto, 2002).
Nature vs. Nurture means that scientists think that people behave as they do according to genetic predispositions (nature). Other scientists believe that people behave or think a certain way because they were taught to be that way (nurture). Scientists believe that DNA plays a part in human behaviors, and this debate continues (Powell, 2010).
The endocrine system is made up of endocrine glands that produce hormones. Hormones are also involved in regulating the emotional life. Hormones organize the nervous system and body tissues plus they have a dramatic effect on mood (Morris & Maisto, 2002).
The endocrine glands are located throughout the body. Thyroid gland is located just below the voice box and it produces Thyroxin, which regulates the body’s metabolism rate. Too much or too little can affect how a person feels and behaves. The thyroid contains four tiny organs that control the calcium and phosphate within the body and can influence levels of excitability (Morris & Maisto, 2002). Melatonin is secreted by the pineal gland. Melatonin regulates the sleep-wake cycle. The pancreas is located between the stomach and the small intestines. The pancreas controls the sugar level in the body. It will secrete two hormones called insulin and glucagon. The pituitary gland is located on the underside of the brain. The pituitary gland is considered the master gland because of its influential role regulating the other endocrine glands (Morris & Maisto,...

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