Thyroxine

• Thyroxine

  • Produced by thyroid glands
  • Hormone for growth and development
  • Controls basal metabolic rate(BMR)
• What does negative feedback control

  Amount of thyroxine in blood
• 1.low thyroxine levels

  stimulate the hypothalamus produce TRH cause pituary to release TSH which Stimulates release of thyroxine by thyroid
• High thyroxine levels

  - TRH is reduced and reduces TSH and thyroxine levels
• The control of thyroxine levels by the hypothalamus and pituitary gland is an example of ??

  Negative feedback
• Low glucose levels

  1. Increase blood glucose by insulin not secreted into blood so glucose not converted
• High glucose levels

  • Insulin secretes in blood, converts glucose into glyceron so glucose levels decrease