CORRECT Answers
adolescence 12-18
how does puberty begin with hormonal signal from the hypothalamus to the pituitary gland
hormone release steps gonadotropin-releasing hormones release LH and FSH and then they release
estrogen or testosterone
which hormones increase during puberty growth hormone and thyroxine
, onset of puberty girls 9-12
onset of puberty boys 10-13
onset of puberty affected by gender, genes, weight, and stress
girls growth spurt onset 10
boys growth spurt onset 12
how long growth spurt lasts 2 years
growth spurt height approx 10 inches
changes in body proportions girls increase in bone density, increased fat deposition, and hips broaden
changes in body proportion boys gain muscle, increase in bone density, increase in rbc, shoulders broaden
primary sex characteristics parts of body directly involved in reproduction that are established before birth
secondary sex characteristic not necessary for reproduction EX: acne, breasts, voice changes
physical changes in both genders thicker, darker hair, pubic hair, more active oil and sweat glands
girls first sign of puberty breast development
menarche beginning of menstruation
average age of menstruation 12.5 yrs
fist sign of puberty in boys testicular enlargement
spermache first ejaculation
tanner stages a widely used system that describes the five stages of pubertal development
tanner stages girls 1 prepubertal
2 breast but and papilla elevation
3 enlargement of breast and areola
4 areola and papila form secondary mound
5 mature stage. projection of papilla, recession of areola
tanner stages boy 1- prepuberty
2- enlarging of testes and scrotum with darkening and ruggae
3- penis grows in length
4- penis grows in width
5-adult
tanner stages both pubci hair