Hormonal control of reproductive behaviors and social affiliation, aggression, fluid homeostasis and feeding, biological rhythms including seasonal reproduction, stress, learning and memory, psychiatric illness, and steroid abuse. Three hours lecture, one hour discussion. Also offered as CAS BI 230. Effective Fall 2019, this course fulfills a single unit in each of the following BU Hub areas: Scientific Inquiry I, Oral and/or Signed Communication, Teamwork/Collaboration.