| A) | The heightened self-consciousness of adolescents.
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| B) | A period of rapid skeletal and sexual maturation that occurs mainly in early adolescence.
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| C) | A girl's first menstrual period.
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| D) | Powerful chemical substances secreted by the endocrine glands and carried through the body by the bloodstream.
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| E) | The sex glands—the testes in males and the ovaries in females.
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| F) | Eating disorder that involves the relentless pursuit of thinness through starvation.
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| G) | Piaget's formal operational concept that adolescents have the cognitive ability to develop hypotheses, or best guesses, about ways to solve problems, such as an algebraic equation.
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| H) | The region of the brain that is the seat of emotions.
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| I) | A structure in the higher portion of the brain that monitors eating and sex.
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| J) | The part of adolescent egocentrism that involves an adolescent’s sense of uniqueness and invincibility.
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| K) | The circumstance of moving from the top position in elementary school to the lowest position in middle or junior high school.
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| L) | Involves adolescents' belief that others are as interested in them as they themselves are; attention-getting behavior motivated by a desire to be noticed, visible, and "on stage."
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| M) | An important endocrine gland that controls growth and regulates other glands.
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| N) | An eating disorder in which the individual consistently follows a binge-and-purge pattern.
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| O) | The location where fibers connect the brain's left and right hemispheres.
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| P) | A form of education that promotes social responsibility and service to the community.
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