7 Biological Changes Con’t b) Growth spurt lasts 2-3 years and you grow 8-10 inchesQuestion:T/F Boys begin the growth spurt before girls.
8 Biological Changes Con’t False- boys begin after girlsb) Girls start at age 10 or 111. girls may be taller and heavier than boys earlierc) Boys start 2 years later at age 12-131. Will usually meet or exceed females
10 PubertyA. Puberty- specific developmental changes that lead to the ability to reproducei) adolescence begins at the onset of pubertyii) changes occur in primary and secondary sex characteristics –
11 Puberty Con’t boys- produce hormone from pituitary gland that causes: 1. Testes to increase and in turn increase output of testosteronea) this causes sex organs to grow, voices to deepen, hair growth on face and chest, broad shoulders, thick bodies, larger heart and lungs, more muscle tissue
12 Puberty Con’tb) Girls- hormones from pituitary glands stimulate ovaries to secrete estrogen1) estrogen growth of breast, hip, and butt tissuea) as result pelvic region widens and hips round
13 Puberty Con’t 2) Small amount of androgens ( similar to testosterone) a) stimulates hair growth of pubic and underarm hairb) estrogen and androgen work together to spur the growth of female sex organsc) estrogen is what regulates the menstrual cycle ( in some birth control pills)d) Menarche is 1st. Period /menstrual cyclei) rite of passage to womanhood
14 IV. MaturationBoysi) boys who mature early have advantage over boys who don’tWhy do you think that is?
15 MaturationMore popular, leader in circle of friends, greater size and strength so better athlete, more self confident and relaxed1) just because physically mature doesn’t mean mentally mature
16 Maturation Girls i) early maturing girls often feel awkward a) taller than classmates and teased about height1) this may cause them to hang around with older girls who look more like them yet they may not be emotionally ready
17 Discussion QuestionHow do you think physical changes can effect the emotional, social and cognitive development of adolescents?