Interstitial fluid is normally hypertonic with respect to the intracellular fluid

Eleven­year­old Jorge looks forward to "becoming a man.". What is the first sign of puberty that Jorge will experience?

a. appearance of facial hair b. deepening of his voice c. appearance of pubic hair d. enlarged testes e. his first ejaculation

According to Bowlby, the key change in parent/child attachments during childhood involves

a. more socialize efforts by the child and less by the parent. b. the child's abandonment of the notion of the parent as a safe haven when frightened. c. a more goal-directed partnership. d. a reduction in the child attempting to negotiate when ritualistic events (e.g., reading a book) occur.