Negative feedback

• What does negative feedback do?


  It works to maintain a body’s steady state, body does opposite of initial change to get back to the original state
• what would you call the reversing of a change in the internal environment?

  negative feedback
• where is thyroxine produced?


  in the thyroid gland
• what does thyroxine do?

  stimulates basal metabolic rate (BMR) and controls speed at which oxygen and food products react to release energy for body to use
• what does the thyroid gland use to produce thyroxine?


  iodine
• what is thyroxine a result of a negative feedback mechanism between?


  the pituitary gland and TSH
• Negative feedback loop for thyroxine

  
• what is positive feedback?


  output of a system acts to enhance the changes to the input of the system
• what are some examples of positive feedback?

  .oxytocin being produced within week 40 of pregnancy to help contractions

  .blood clotting

  .lactation, the more the baby suckles the more milk is produced

  .adrenalin produced by adrenal glands it increases heart rate and boosts delivery of oxygen and glucose to muscles and brain