reproductive systems 14.3 Flashcards
y chromosome has a gene called the ____
testes determining factor (TDF)
male sex hormones=
androgens
puberty begins between ages ___ for males
10-13
GnRH comes from ___
hypothalamus
GnRH begins ___
puberty
GnRH stimulates_____
anterior pituitary to release FSH and LH
FSH begins
sperm production
LH releases
testosterone from testes
FSH causes production of sperm in __
seminiferous tubules of testes
Sperm production in seminiferous tubules causes the release of __
Inhibin from tubules
Inhibin inhibits___
production of FSH in anterior pituitary to keep sperm levels constant (negative feedback)
LH causes production and releases of ___
testosterone
testosterone inhibits release of ___
LH from anterior pituitary to keep testosterone levels constant
andropause:
declining testosterone levels with aging (loss of muscle, decreased sperm production etc)
puberty for females begins between the ages of ____
9-13