The Endocrine System

• Hormones are chemical messengers which travel in the blood to other parts of the body.
• Hormones are secreted in various glands in the body
• Pituritary gland

  • Produces many hormones which regulate body conditions
  • Produces FSH, LH and ADH
• Ovaries

  • Produce oestrogen and progesterone
• Testes

  • Produce testosterone
• Thyroid

  • Produces thyroxine
• Adrenal gland

  • Produces adrenaline
• Pancreas

  • Produces insulin and glucagon
• Adrenaline- Increases heart rate and prepares the body for 'flight or fight'
• Thyroxine - Regulates the metabolic rate, heat rate and temperature
• Insulin - Lowers glucose by turning it into glycogen
• Glucagon - Converts glycogen into glucose, increasing blood sugar
• ADH - Controls the permability of water collecting duct
• Testosterone - Controls male puberty and sperm production
• FSH - stimulates the release of an egg from the ovaries
• LH - Causes the egg to mature and develop
• Nerves

  • Very fast action
  • Act for a very short time
  • Act on a precise area
• Hormones

  • Slower action
  • Act for a long time
  • Act ini a more general way
• Type 1 diabetes

  • Pancreas produces little to no insulin
  • Often need insulin injections to control the glucose
  • Very effective treatment
  • Depends on the diet and how active they are
  • Can be limited with intake of food and excercise
• Type 2 diabetes

  • Person becomes resistant to theur own insulin
  • Risk can be increased with obesity and died
• Adrenaline

  • Released in stressful or scary situations
  • Brain detects fear or stress and sends nervous impulses to the adrenal glands
  • Increases supply of glucose and oxygen to the cells in the brain and muscles by increasing heart rate
• Thyroxine

  • Regulates metabolism