L4-6 quiz

• iodine is necessary for thyroid hormone synthesis
• oxytocin stimulates uterine contractions
• ACTH stimulates glucocorticoid release
• Mullerian inhibiting hormone is made by the embryonic testes
• GnRH stimulates release of LH and FSH
• examples of sex steroid hormones:

  • oestrogen
  • progesterone
  • testosterone
  • oestradiol
• prolactin is a peptide hormone synthesised by the anterior pituitary
• prolactin stimulates milk production by the mammary glands
• secreted by the anterior pituitary gland:

  • prolactin
  • thyroid stimulating hormone
  • melanocyte stimulating hormone
  • adrenocorticotropic hormone
• oxytocin is released by the posterior pituitary gland
• human chorionic gonadotropin (hCG) has actions similar to LH because

  during the menstrual cycle LH stimulates the corpus luteum to secrete progesterone and oestradiol, hCG has the same action in early pregnancy
• a surge in LH causes ovulation
• oestrogen levels rise during the follicular phase
• FSH action leads to an increase in oestrogen levels
• oestrogen levels are low in the luteal phase
• GnRH release from the hypothalamus are inhibited by gonadal steroids
• an adult human male produces sperm continuously by meiotic division of the germinal cells lining the seminiferous tubules