BCS 110 Lecture Notes - Lecture 17: Libido, Seminal Vesicle, Estrous Cycle

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

Document Summary

X codes for more genes (600-700); y can be more potent (60-70: sex chromosomes contain the genetic programs that direct sexual development. [in adults, testes also produce the sperm and the ovaries make the eggs that join to form the zygote. ] Different from other hormones because they are made from cholesterol: there are three kinds of steroid hormones, released by both types of gonads: androgens (testosterone), estrogens (estradiol) and progestins. The testes release more androgens; the ovaries more estrogens: steroids are synthesized from cholesterol (fat), and thus are fat-soluble. Entering cell and binding to receptors that bind to chromosomes, where they activate/inactivate genes: super effective - altering gene expression, have to make testosterone to change into estrogen, control of sex hormone release, periventricular nucleus vs. paraventricular. Paraventricular - release oxytocin - pair bonding hormone: periventricular nucleus - neurons in the hypothalamus via the pituitary regulate the release of sex hormones from the gonads.