Please enable JavaScript.
Coggle requires JavaScript to display documents.
Ch. 6 - Puberty - Coggle Diagram
Ch. 6 - Puberty
Female Onset
Hypothalamic GnRH neurons must develop the ability to respond to estradiol positive feedback before they can cause sufficient quantities of GnRH to induce ovulation
-
-
-
-
-
Once puberty is reached females will have surges of LH during estrus cycle as well as low amplitude pulses during the time between surges
Even though the neurons in the surge center in prepubertal females are sensitive to estradiol, they cannot secrete much GnRH because estradiol is too low
Male Onset
Males only have a tonic center, not a surge center
-
-
The onset of puberty is brought about because of decreased hypothalamic sensitivity to negative feedback by testosterone/estradiol
-
Onset of puberty depends on the ability of specific hypothalamic neurons to produce GnRH in sufficient quantities to promote and support gametogenesis
- Differs in male and female
-
Testosterone defeminizes the hypothalamus during embryogenesis and "eliminates" the GnRH surge center in the male
-