Mammalian Endocrine System pt. 2

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Mammalian Endocrine System pt. 2
2013-04-26 08:44:28
BIO 220

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  1. Gonads (ovaries and testes):
    • produce
    • steroid hormones: androgens, estrogens and progestins in   differing proportions
  2. androgens
    • testosterone is primary androgen
    •   -  stim. development and maintenance of male reproductive   system and secondary sex characteristics.
  3. Esstrogens
    • Estradiol is the primary estrogen.
    •   -  Maintain female reproductive system and stimulate secondary   sex characteristics
  4. Progestins
    •  include progesterone
    •   -  preparing and maintaining uterus lining.
    •   -  regulated by gonadotropins FSH and LH, which are regulated   by gonadotropin-releasing hormone (GnRH).
  5. Pineal gland
    • Melatonin (modified amino acid) participates in regulation of circadian   cycles.  
    • -  Specifically, causes one to become tired.
    • -  Best antioxidant and free radical scavenger.
  6. More than __ hormones identified in humans.
    Hormones grouped into __ according to similarities in chemical structure:
    • 50
    • 3 classes
    • Peptide,
    • 1) Polypeptide, Protein, Glycoprotein hormones

    2)  Those derived from Tyrosine.

    3)  Steroids hormones
  7. Invertebrate hormones
    - functions
    homeostasis, reproduction, development and behavior
  8. Sea slug
    peptide hormone secreted by specialized neurons stimulates egg laying while inhibiting feeding and locomotion
  9. All arthropods have ___.
    extensive endocrine systems
  10. Ecdysone
    secreted by prothoracic glands; triggers molting and development of adult characteristics and metamorphosis
  11. Brain hormone
    stimulates production of ecdysone.  Resembles a releasing hormone in vertebrate system
  12. Juvenile hormone
    secreted by corpora allata; promotes retention of larval characteristics