PSB-4731 Study Guide - Quiz Guide: Sex Steroid, Anabolic Steroid, Posterior Pituitary
Document Summary
How is this different from the actions of peptide hormones: steroid hormones lipid-soluble, derived from cholesterol; can move easily thru cell"s phospholipid membrane. Sex steroids activate specific receptor molecules sequence of events is triggered that affect"s the cell"s gene expression: peptide hormones water-soluble proteins; stored in vesicles, released in response to a specific stimulus. Secreted from the posterior pituitary; involved in reproductive and parenting behavior, orgasm, uterine contractions, milk letdown reflexes. When castrated as chicks, adults showed no crowing or sex behavior; if he implanted testes in abdomen normal male development. Effect of hormone depends on type of receptor and type of tissue (ex: estrogen can affect brain, uterus, breasts, bone, and fat). Hormones affect sensory, integrative, and motor processes which lead to appropriate behavior in response to specific stimuli. Leads to steroidogenesis in the gonads and maturation of gametes. Luteneinzing hormone secreted from the anterior pituitary.
