What is skeletal age, and how is it measured? Give an example of a sex difference and an ethnic difference in skeletal age
What will be an ideal response?
The best estimate of a child's physical maturity is skeletal age—a measure of development of the bones of the body. The embryonic skeleton is first formed out of soft, pliable tissue called cartilage. In the sixth week of pregnancy, cartilage cells begin to harden into bone, a gradual process that continues throughout childhood and adolescence. Just before birth, special growth centers, called epiphyses, appear at the two extreme ends of each of the long bones of the body. Cartilage cells continue to be produced at the growth plates of these epiphyses, which increase in number throughout childhood and then, as growth continues, get thinner and disappear. After that, no further growth in bone length is possible. Skeletal age can be estimated by X-raying the bones to determine the number of epiphyses and the extent to which they are fused.
African-American children tend to be slightly ahead of Caucasian-American children in skeletal age. And girls are considerably ahead of boys—a gap of about four to six weeks at birth, which widens over infancy and childhood.
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According to the Guidelines for the Undergraduate Psychology Major,
being able to display open-mindedness and healthy skepticism in evaluating the quality and credibility of information would most fully meet the competency of skills in psychology. Fill in the blank with correct word
Selye did not believe that all stress was negative. In fact, he referred to negative stress as ____ and coined the term ____ to refer to positive stress. a. distress, eustress c. threat, challenge b. eustress, uplift d. distress, wellness
Fill in the blank(s) with correct word