HSCI 120 Lecture Notes - Lecture 4: Fetal Alcohol Spectrum Disorder, Amniotic Sac, Hemolytic Disease Of The Newborn
24 Apr 2017
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Document Summary
Hormones - chemical messengers that are released by endocrine organs and carried through the body via the circulatory system. Play a role in aging, growth, metabolism, immune response, sexual response, and reproduction. Group into 3 main classes: lipid and phospholipid hormones. Estrogens and androgens: sex steroids mainly made and secreted by testes/ovaries, additional androgens and estrogens. Sex hormones - regulate sexual maturity and reproduction. Oxytocin and vasopressin: associated with childbirth and lactation, maternal behaviour and bonding, increases af liating behaviour, smooths the way for sexual contact, being in love associated with high levels of oxytocin. Human birth rates are highest in late summer and autumn, and lowest in late winter and early spring. Brain connects with reproductive system through hpg access. Pituitary and hypothalamus communicate with each other and with gonads via hormones. Fsh lh feedback loops activates ovarian cycle: Regulated by gnrh and affected directly by changes in levels of estrogen and progesterone.
