Psychology 2220A/B Lecture Notes - Lecture 4: Freerunning, Gonad, Optic Chiasm

• School: Western University
• Department: Psychology
• Course: Psychology 2220A/B
• Professor: Scott Mac Dougall- Shackleton

Document Summary

Hormone action hormone action via 2 main processes: water soluble hormones (e. g. peptides) they cannot get through a cell membrane, bind on outside of cell and get effects that way, fat soluble hormones (e. g. steroids) (cid:224)water soluble hormones cannot cross cell membranes bind to membrane receptors initiate 2nd messenger system within cell (cid:224)fat soluble hormones e. g. steroid hormones freely cross cell membrane bind to intracellular receptors steroid receptor complex modifies cell act as transcription factors (change gene transcription) Master gland ; aka hypophysis actually 2 distinct glands: anterior = adenohypophysis, posterior = neurohypophysis (cid:224)anterior pituitary hypothalamus secretes neurohormones in portal blood stream, releasing hormones, inhibiting hormones stimulate release of tropic hormones from anterior pituitary, e. g. growth hormone, follicle stimulating hormone figure 2. 29 anterior versus posterior (cid:224)posterior pituitary receives projections from hypothalamic neurosecretory cells acts as reservoir for oxytocin and vasopressin.