PSYCH 3313 Lecture Notes - Lecture 28: Hypothalamic–Pituitary–Adrenal Axis, Sympathetic Nervous System, Anterior Pituitary

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Selye"s general adaptation sydrome: stressor alarm resistance exhaustion, two systems mediate the stress response, sympathetic nervous system increase catecholamines (norepinephrine and epinephrine, hpa activations increase cortisol. Stress hormones: norepinephrine (noradrenaline), epinephrine (adrenaline, increase output from heart, liberate glucose from muscles for additional energy, cortisol, increases energy by converting proteins to glucose, increasing fat availability and increasing metabolism, long-term energy increase for sustained stress. Activation of the hpa axis: hypothalamus pituitary gland, hormones (acth) released that stimulate adrenal glands, stress hormones released to bloodstream, overview, sensory systems and higher cognitive centers identify specific stimulus as a stressor. Releasing hormone (crh) release by the hypothalamus: with less crh, less acth and cortisol will be released, amygdala stimulates crh release in the paraventricular nucleus of the. Stress and epigenetics: maternal care has an epigenetic effect on gene expression, the mothers" level of care helps to match their children"s responses to the environments they"re likely to experience.

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