BCS 110 Lecture Notes - Lecture 17: Cortisol, Sexually Dimorphic Nucleus, Heterosexuality

• School: University of Rochester
• Department: Brain and Cognitive Sciences
• Course: BCS 110
• Professor: Kevin Davis

Document Summary

9:30 am sexual differentiation in mammals begins at fertilization with the production of one of two different kinds of zygotes. Hormones & sexual development: humans are dimorphic (come in two standard models male & female) 1. releasing/inhibiting hormones are released from hypothalamic neurons into the hypothalamopituitary portal system. 1. oxytocin/vasopressin are synthesized in the paraventricular and supraoptic neuclei of the hypothalamus. 2. hormones are carried by axonal transport down the pituitary stalk. 3. hypothalamic hormones increase/decrease the release of anterior pituitary hormones into general circulation. Exam 3 page 1 circumventricular organs to stabilize daily blood levels of hormones blood brain barrier protects the brain from the effects of these circulating hormones. Wolffian system - male reproductive ducts (seminal vesicles & vas deferens) Genotype & phenotype variations: genotype: phenotype: between male and female) fertility (incompletely phenotypically female) standard genotype: xx or xy abnormal genotypes: xxx, xyy, xo, and xxy.