homeostasis

• Homeo Stasis


  Maintaining constant optimal internal body conditions
• The optimum temperature for enzymes is 31°C
• Temperature is too high


  Enzymes will denature and stop working
• Heat can be generated by movement and exercise
• Heat can be lost by sweating, removing extra clothing, vasodilation (blood vessels widen)
• The human body is 60-70% water
• Water is used in many processes
• Severe dehydration can cause death, mild dehydration can cause dizziness and dry mouth
• Water can be gained by respiration, food and drinking water
• Water is lost by exhaling air, sweating, urine and faeces
• Blood sugar (glucose)


  Used to provide energy by respiration
• Blood sugar concentration is high


  Causes red blood cells to shrink
• Blood sugar concentration is low


  Causes red blood cells to swell and burst
• Blood sugar level is controlled by the pancreas
• The pancreas produces insulin when blood sugar is high and glucagon when blood sugar is low