Growth Flashcards
Puberty begins when what chemical increases in concentration
GnRH
What does GnRH stimulate the release of
LH and FSH, for secondary sexual development
What cells are stimulated by LH in boys and what do they stimulate
LH stimulates Leydig cells to produce testosterone
What cells are stimulated by FSH in boys and what do they stimulate
FSH stimulates Sertoli cells to induce stermatogenesis
What chemical produced by Sertoli cells induces negative feedback on FSH
Inhibin B
What cells are stimulated by LH in girls and what do they produce
LH stimulates Theca cells to produce progesterone and androstenedione
What cells are stimulated by FSH in girls and what do they induce
FSH stimulates granulosa cells to induce oogenesis or folliculogenesis
At what age do girls enter puberty
11
How many months after girls enter puberty do boys
6 months
When do girls have their growth spurt
At the end of puberty, aged 12
When do boys have their growth spurt
When their testicular volume is 10-12mls, aged 14
When is precocious puberty in females
Less than 8 wand begin breast development
When is precocious puberty in males
Less than 9 and have a testicular volume of less than 4 mls
What chemical causes fusion of the growth plates so no bone growth can occur
Oestrogen
When is it classed as delayed puberty
Females 13, males 14
