control of blood glucose

• Homeostasis is the regulation of internal conditions in cells/organisms to create optimum conditions for cell function.
• 1. Blood glucose concentration rises after a meal.
  2. Pancreas detects rise in blood glucose concentration.
  3. Increases secretion of insulin and decreases secretion of glucagon.
  4. Insulin causes muscle and liver cells to remove glucose from blood and store it as a glycogen.
  5. Blood glucose concentration falls.
• 1. Blood glucose concentration falls after exercise.
  2. Pancreas detects fall in blood glucose concentration.
  3. Decreases secretion of insulin and increases secretion of glucagon.
  4. Glucagon causes liver cells to convert glycogen to glucose and release it into the blood.
  5. Blood glucose concentration rises.
• Glucose is needed for respiration.
• Type 1 diabetes:

  • immune system damages the insulin-secreting pancreatic cells

  • no insulin

  • inject insulin into fat below skin and have to work out the right amount so blood glucose concentration is kept within limits