Adrenaline + Thyroxine

• What's adrenaline?


  -A hormone

  -Released from adrenal glands

  -Travels in the blood
• Name some effects of adrenaline


  -Increased heart rate

  -Increased breathing rate

  -Dilated pupils
• What's thyroxine?


  -A hormone released from thyroid gland

  -Controls basal metabolic rate
• Where is the thyroid gland found?


  Neck
• Which organ is the adrenal glands near?


  Kidneys
• Define metabolic rate 


  Speed at which chemical reactions occur inside cells
• What is negative feedback?


  If there is a change away from the normal, there will be a response to reverse the change
• Where is TSH released from?


  Pituitary glands (master glands)
• What does TSH stand for?


  Thyroid Stimulating Hormones
• Where is the master glands found?


  The brain
• What other hormones are released from the pituitary glands?


  -FSH + LSH (in the menstrual cycle)

  -ADH ( controls amount of water being absorbed by kidneys)
• Describe how TSH controls the secretion of thyroxine from the thyroid glands

  Pituitary gland released TSH -> Travels in the blood -> Stimulates the thyroid glands -> Releases more thyroxin -> Metabolic rate increases
• What happens if your metabolic rate is too high?


  The pituitary gland stop released TSH -> causes the thyroid glands to stop releasing thyroxin
• What is a hormone?


  A chemical messenger released from a gland and travels in the blood to a target organ