Hormones

• Hormones


  Chemical messengers in the body, secreted by endocrine glands
• Hormones


  • Different hormones affect different target organs
  • The blood transports hormones from the secreting cell to their target cells
  • Hormones bind to the target cells using receptors
• Endocrine glands


  • Pituitary gland
  • Adrenal glands
  • Ovaries
  • Testes
  • Pancreas
• Hormones


  • Adrenaline
  • ADH
  • Insulin
  • Testosterone
  • Oestrogen
  • Progesterone
• Adrenaline


  Hormone produced by the adrenal glands, acts on the liver and heart
• ADH


  Anti-diuretic hormone, causes more water to be reabsorbed into the blood in the kidneys
• Insulin


  Causes cells in the liver and muscles to store glucose
• Testosterone


  Main male sex hormone, supports development of sperm cells and male secondary sexual characteristics
• Oestrogen


  Main female sex hormone, encourages regeneration of the uterus and promotes female secondary sexual characteristics
• Progesterone


  Supports pregnancy and maintains the uterus lining
• Hormones travel through the plasma in blood
• Hormones have long-lasting effects, and have widespread effects
• Speed of message 


  Slow
• Type of message 


  Chemical