PSY354H5 Lecture Notes - Lecture 4: Rete Testis, Semen, Bone Density
Document Summary
The endocrine system: aka body hormonal system. Some hormones are also call neurotransmitters differentiation based on the tissue or cells that they interact with: hormones are chemical signalling molecules that communicate via bloodstream, greatly influence behaviour (growth, change, immune response) Regulate behaviour, growth, development, menstrual cycle, hunger, thirst, mood. Regulate functional state of the uterus in women, maintains bone density, protects against blood clots (lower heart attack chances) Lack estrogens: grow really tall (no estrogens to terminate growth) Continues to produce as long as the rete testis are functioning properly (thus, can basically produce estrogens all their life) Three major classes of hormones: protein and peptides. Two main mechanisms of hormones action: protein hormone action, steroid hormone action. Steroid hormones go directly through the lipid membrane to bind to steroid receptors. Takes about 15-20 mins for cortisol to circulate and appear in saliva. Early stress doesn"t affect development in early years. Estriol: only produce during pregnancy, produce by the placenta.
