HPA Axis

1.What is the function of the HPA bloc and why should someone with Type-A personality be concerned about the effects of HPA axis activation? (20 points) The HPA Axis also known as the Hypothalamic Pituitary supr benal secreter Axis, is a complex set of direct influences and feedback interactions among the hypothalamus (a part of the news program that controls visceral clays involved in fight or profligate reactions). The hypothalamus regulates neuronal controls, the basic biological functions that include tasks that regulating hunger, thirst, temperature, intrinsic arousal, and is also involved with emotions. It also includes the pituitary gland (the lapse gland connected to the hypothalamus), and the adrenal glands (glandular-hormonal control). The interactions among these organs constitute the HPA axis. A major part of the neuroendocrine system controls reactions to stress and regulates galore(postnominal) another(prenominal) body processes such as dige stion, the immune system, mood and emotions, sexuality, and cut fastener storage and expenditure. The main hormones that activate the HPA Axis atomic number 18 corticotrophin-releasing factor, vasopressin, and adrenocorticotrophin hormone. It is completed by the negative feedback of cortisol on the hypothalamus and pituitary. cortisol negatively affects the immune system and prevents the release of immunotransmitters. red ink of CRH from the hypothalamus is influenced by stress and by blood levels of cortisol. Increased performance of cortisol signals an alarm reaction to stress, facilitating an adaptive phase of a usual adaptation syndrome in which alarm reactions including the immune reply are suppressed, allowing the body to attempt countermeasures. When psychosocial stressors occur, a sequence of events called a neural cascade begins. Higher cortical and limbic system compendium defines the stressor internally as a threat that requires a response. Signal s send to the hypothalamus initiate release ! of corticotrophin-releasing factor (CRF), which directs the anterior...If you want to read a full essay, order it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay