PSYO 2170 : Hormones and Behavior II.docx

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Andenohypophyseal hormones atch (feedback on the hypothalamic hormones) Serotonin regulates how much crf is released, which changes how much acth gets released, which finally changes how much cortisol gets released. Act on receptor; action at receptor changes cell its on. Some chemicals (steroid hormones) act on intracellular receptors. Each of the hormones that get secreted can all go back and act on previous receptors negative feedback. Feedback mechanisms decrease further functioning of the system. Depiction of the main centre of control for all hormone systems. Son and pvn have neurosecretory cells where they are able to project into posterior pituitary. Those nuclei and others also have parvicellular neurosecretory cells which release hormones into the circulation. 4 ways nerves act to regulate hypothalamic hormones. Nts primarily influence hypothalamus, which influences the release of the releasing hormones, which then influences amount of hormone. Beta-endorphin is released simultaneously with acth; synthesized by the same cells. Pulsatile secretion of acth and cortisol in humans.