In MRI technology, the area of the body to be imaged is exposed to
A. x-rays.
B. radioactivity.
C. radio frequency (RF) pulses.
D. a gamma camera.
Answer: C
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One of the first signs of puberty in most girls is __________.
A. menstruation B. release of an ovum C. weight loss D. the growth spurt
James has a quiet temperament, which leads him to prefer less activity as a child. Consequently, he often plays calmer games and has female playmates. When he reaches adolescence, he continues to relate better to girls, and boys seem mysterious, exotic, and arousing. He ultimately develops a homosexual orientation. James' experiences fits best with ____ explanations of sexual orientation
a. biological b. psychological c. psychobiological d. sociocultural
Worldwide, approximately what percent of new cases of AIDS are among people between the ages and 15 and 24?
A) 20 B) 30 C) 80 D) 50
Jean-Jacques Rousseau thought that children were born with an innate sense of right and wrong and referred to children as __________
a) noble savages b) natural animals c) tabula rasa d) evolved animals