PSY395H5 Lecture Notes - Lecture 10: Amygdala, Leydig Cell, Birth Weight
2 Nov 2015
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Not being able to have access to resources can be detrimental. Same hormones are active when seeking food. The adrenal cortex and medulla are sources of most stress hormones. The brain signals pit to tell adrenal that we"re stressed. From there, cortex and medulla stim specific hormones. Within second receiving stressor: medulla: secrete ep and ne. The catecholamines: cortex: a few seconds later, the cortex rel"s the glucocorticoids (cortisol, cortisone, etc. ) Secretion of ep from adrenal medulla inc after any stressor, a means to adapt to the stress. Many studies that followed, demonstrated the stressor theory on cardio system and resp system. Ep and ne rel"s elevate resp, heart rate, and blood sugar. Presence of catecholamine in blood of animals exposed to humans. If restrain animal, very stressed thus high levels. In humans, the catecholamine concentration is low before exam, but as days approach exam, there are peaks of concentration.
