Examlex
According to the text, the greatly expanded production of growth hormones occurs at about age ____ for U.S. girls and about age ____ for U.S. boys.
Secular Trend
A long-term pattern or trend observed over several generations, often referring to changes in physical or social characteristics of populations.
Onset
Describes the beginning or start of something, such as a disease, a symptom, or a phase of life.
Puberty
The phase of human development during which a child's body matures into an adult body capable of sexual reproduction, marked by various physiological changes.
Gray Matter
Region of the brain composed mainly of neuronal cell bodies, involved in muscle control, sensory perception, and decision making.
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