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Ch. 13 Notes Stress


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Notes slide show about stress and the endocrine system

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Ch. 13 Notes Stress

  1. 1. The Stress Response
  2. 2. Stress <ul><li>A specific response by the body to a stimulus that disturbs or interferes with the normal physiological equilibrium of an organism – can be physical or mental </li></ul><ul><li>Eustress – stress that prepares us to meet challenges – healthful </li></ul><ul><li>Distress – Harmful, strain, anxiety, suffering </li></ul>
  3. 3. When stress occurs Homeostatic mechanisms attempt to re-establish homeostasis <ul><li>If the stress is too extreme and normal mechanisms are not enough then bodily changes begin to occur = The Stress Response </li></ul>
  4. 4. Stage 1 – Fight-or-Flight <ul><li>Short-lived </li></ul><ul><li>Controlled by the ANS and Adrenal Medulla </li></ul><ul><li>Increase in blood pressure, cut off blood supply to non-essential organs, increase glucose production </li></ul>
  5. 5. Stage 2 – Resistance Reaction <ul><li>Longer lasting </li></ul><ul><li>Controlled by hormones from the hypothalamus </li></ul><ul><li>Stimulates secretion of ACTH (adrenocorticotropic hormone), which releases cortisol, which then stimulates the production of glucose, break down of triglycerides, and proteins to make ATP </li></ul><ul><li>Secretes hGH – which helps in the breakdown of fats and proteins </li></ul><ul><li>Secretes TSH – which also increases glucose production </li></ul><ul><li>Overall – We gain energy to help fight off stressor </li></ul>
  6. 6. Stage 3 - Exhaustion <ul><li>If stage 2 fails to bring body back to homeostasis we enter stage 3 </li></ul><ul><li>Our resources become depleted – need rest and to gain back our resources </li></ul><ul><li>Systems begin to fail and get damaged, we can get sick, or develop diseases </li></ul>
  7. 7. Activity
  8. 8. For each of the following, indicate at which stage they would occur as part of the general adaptation syndrome (stress response)
  9. 9. Choices Fight-or-Flight Resistance Reaction Exhaustion
  10. 10. <ul><li>Initiated by hypothalamic releasing hormones </li></ul><ul><li>2. Initiated by the sympathetic division of the autonomic nervous system </li></ul><ul><li>Immediately prepares the body for action </li></ul><ul><li>4. Increases Cortisol release </li></ul><ul><li>Short-lived Response </li></ul><ul><li>Body resources become depleted </li></ul><ul><li>Increased release of many hormones that ensure a continued ATP supply </li></ul><ul><li>Failure of pancreatic beta cells </li></ul><ul><li>Nonessential body function inhibited </li></ul>
  11. 11. Solutions <ul><li>R </li></ul><ul><li>F </li></ul><ul><li>F </li></ul><ul><li>R </li></ul><ul><li>F </li></ul><ul><li>E </li></ul><ul><li>R </li></ul><ul><li>E </li></ul><ul><li>F </li></ul>