PSB-2000 Study Guide - Paramesonephric Duct, Sexually Dimorphic Nucleus, Posterior Pituitary
Document Summary
Sex hormones: classes of sex hormones. Organizational effects of hormones: reproductive organs, brain, behavior. Activational effects of hormones: reproductive behavior, menstrual cycle. Sex hormones: steroid hormones, sex hormones are released mostly by gonads (ovaries and testes), and to a lesser extent by adrenal glands, affect brain, genitals, and other organs, classes: Organizing effects vs. activating effects of sex hormones: organizing. Occur mostly during sensitive periods in development (well before birth in humans) Determine whether brain and body will develop male or female characteristics: activating. Occur any time in life, when a hormone temporarily activates a response (physiological or behavioral) Effects last as long as hormone is present thus generally temporary. Includes menstrual cycle in women, sexual excitement in men (and in women there is some data ) How do hormones affect behavior: alter activity in certain brain regions change the way the brain responds to certain stimuli. T and probably e decrease pain and anxiety.
