The key event that starts sexual maturation at the onset of ...

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The key event that starts sexual maturation at the onset of puberty is that
 
  a. the ovaries and testes release gonadotropic hormones.
  b. estradiol and testosterone are released from the hypothalamus.
  c. the pituitary secretes gonadotropin-releasing hormones.
  d. LH and FSH are released from the hypothalamus.
  e. the adrenals release adrenaline.

Question 2

An example of an activational effect induced by the hormone estradiol would be
 
  a. growth of the uterine lining during the menstrual cycle.
  b. growth of axillary hair in females.
  c. differentiation of the Wolffian system into the fimbriae, Fallopian tubes, uterus, and vagina.
  d. maturation of the ovaries in a female.
  e. alteration of the vocal cords to create a deep voice.

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Answer to Question 1

Answer: c. the pituitary secretes gonadotropin-releasing hormones.

Answer to Question 2

Answer: a. growth of the uterine lining during the menstrual cycle.