Sympathetic Nervous System (SNS) activatedģ) CRH and related. SYSTEMS STIMULATED BY THE STRESS RESPONSEĢ) Hypothalamus induced to release CRH and related secretagogs as well as activation of vasopressin/oxytocin neurons The goal of these systems is to maintain homeostasis - to buffer the internal environment from the external environment. Walter Cannon characterized the response of the adrenal medualla to release epinephrine (in conjunction with the sympathetic nervous system activation which triggers the activation of the adrenal medulla) as the fight or flight response. Hans Seyle characterized the response of the adrenal cortex the General Adaptation Syndrome (as he assumed that the body was exhibiting an adaptive response to stress - which is only true part of the time) These two endocrine responses comprise the two primary components of the stress response. The adrenal cortex releases glucocorticoids (about 50 diffent related hormones) the adrenal merdulla releases epinephrine. The stress-response includes two endocrine responses (from the same endocrine gland - the adrenal). STRESS-RESPONSE: body's adaptations to stressors STRESSOR: anything that disrupts the body'd physiological balance These are all things that are STRESSORS in other words, they can cause a STRESS RESPONSE Illness injury lack of water swarms of locust malnourishment physical exhaustion predation lack of control loss of loved one mid-term exams Neuroendocrinology of the Stress Response

Adrenal medulla stress response