Adolescent egocentrism | The heightened self-consciousness of adolescents
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Anorexia nervosa | Eating disorder involving relentless pursuit of thinness through starvation
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Bulimia nervosa | An eating disorder in which the individual consistently follows a binge-and-purge pattern
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Depression | Experiencing symptoms of fatigue, irritability, lack of interest in daily activities, and suicidal thoughts over a prolonged period
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Dopamine | One of the key brain chemicals that carry and influence messages between nerve cells
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Ethologists | Scientists who research the connections between animal and human behaviours
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Gonads | The sex glands; testes in males and ovaries in females
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Hidden curriculum | Concept that every school has a pervasive moral atmosphere
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Hormones | Powerful chemical substances secreted by the endocrine glands and carried through the body by the bloodstream
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Hypothalamus | A structure in the higher portion of the brain that monitors eating, drinking, and sex
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Hypothetical-deductive reasoning | Piagets formal operations concept that adolescents have the ability to develop hypotheses about ways to solve problems
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Imaginary audience | Adolescents belief that others are as interested in them as they themselves are
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Menarche | First menstruation
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Personal fable | Part of adolescent egocentrism; an adolescent's sense of uniqueness and invulnerability
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Pituitary gland | An important endocrine gland that controls growth and regulates other glands
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Puberty | A period of rapid skeletal and sexual maturation that occurs mainly in early adolescence
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Sexually transmitted infections (STIs) and diseases (STDs) | Diseases that are contracted primarily through sexual contact
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