Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. Why is the nervous system important?
   • The nervous system enables humans to react to their surroundings and to coordinate their behaviour.
2. How is the nervous system adapted to its function?
   • The responses formulated by the nervous system are very quick and therefore allow responses to be fast and protect the organism from danger.
3. What do the control systems in the body include?
   • All control systems include:a) Cells called receptors, which detect stimuli (changes in the environment), b) coordination centres (such as the brain, spinal cord and pancreas) that receive and process information from receptors, c) effectors, muscles or glands, which bring about responses which restore optimum levels.
4. How is this control made automatic?
   • It may involve chemical or nervous responses.
5. What is homeostasis?
   • Homeostasis is the regulation of the internal conditions of a Cell or organism to maintain optimum conditions for function in response to internal and external changes.
6. Why is homeostasis important?
   • Homeostasis maintains optimal conditions for enzyme action and all Cell functions.
7. What things does homeostasis control?
   • In the human body, these include control of: a) blood glucose concentration. B) body temperature. C) water levels.