You ask teens how often they play violent video games and ask classmates to rate how aggressive they are, then look for a relationship between the two scores. This is an example of a(n) _____ study

The first hormone that signals the onset of puberty is in the _____.

A) hypothalamus B) pituitary gland C) gonads D) sex hormones

The hormones vasopressin and oxytocin are associated with _______________ and might be related to ________

A) positive social relationships; good health B) positive social relationships; poor health C) childhood stress; good health D) childhood stress; poor health