Introduction to Psychology 10th Edition by Rod Plotnik,Haig Kouyoumdjian

Exercise 25

Girls and boys experience three major biological changes as they go through a period called (a) _____. For both girls and boys, one of these changes is the development of (b) _____ maturity, which for girls includes the first menstrual cycle, called (c) _____, and for boys includes the production of sperm. These physical changes in girls and boys are triggered by a portion of the brain called the (d) _____. A second change is the development of (e) _____ sexual characteristics, such as pubic hair and gender-specific physical changes. A third change is a surge in (f) _____ growth, especially height. The changes for girls tend to start about two years earlier than those for boys.