-
Gonads (ovaries and testes):
- produce
- steroid hormones: androgens, estrogens and progestins in differing proportions
-
androgens
- testosterone is primary androgen
- -
stim. development and maintenance of male reproductive system and secondary sex characteristics.
-
Esstrogens
- Estradiol is the primary estrogen.
- - Maintain female reproductive system and stimulate secondary sex characteristics
-
Progestins
- include progesterone
- - preparing and maintaining uterus lining.
- - regulated by gonadotropins FSH and LH, which are regulated by
gonadotropin-releasing hormone (GnRH).
-
Pineal gland
- Melatonin (modified amino acid) participates in regulation of circadian cycles.
- - Specifically, causes one to become tired.
- - Best antioxidant and free radical scavenger.
-
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
-
Invertebrate hormones
- functions
homeostasis, reproduction, development and behavior
-
Sea slug
peptide hormone secreted by specialized neurons stimulates egg laying while inhibiting feeding and locomotion
-
All arthropods have ___.
extensive endocrine systems
-
Ecdysone
secreted by prothoracic glands; triggers molting and development of adult characteristics and metamorphosis
-
Brain hormone
stimulates production of ecdysone. Resembles a releasing hormone in vertebrate system
-
Juvenile hormone
secreted by corpora allata; promotes retention of larval characteristics
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