Endocrine function of the testes Biosynthesis of testosterone
Principle hormon of testes
Synthesized in Leydig cells from cholesterol under control of LH and FSH
Synthesized by adrenal cortex from androstenedione
C-19 steroid, declines with age in males
blood - 2/3 bound to GBG (gonadal steroid-binding globulin), 1/3 to albumin