Feedback

• Negative Feedback:

  The mechanisms to bring about a change (the response) are switched off/ inhibited as a result of that change.
• Positive Feedback:

  This occurs when the feedback causes corrective measure to remain turned on resulting in the system to deviate even further from the set point.
• Positive Feedback, Hypothermia:

  • Core temperature decrease
  • Enzyme rates slow
  • Respiration rate slows
  • Less heat from respiration
• Positive Feedback, Child Birth:

  • Baby pushes against the cervix
  • Impulses sent to pituitary gland
  • Pituitary gland produces oxytocin
  • Oxytocin causes uterus to contract