Nervous system

• What is homeostasis?


  Homeostasis is the regulation of the internal conditions of a cell or organism to maintain optimum conditions for function.
• Why is homeostasis important for cells and organisms?

  It maintains optimal conditions for enzyme action and all cell functions.
• What are the key factors controlled by homeostasis in the human body?

  • Blood glucose concentration
  • Body temperature
  • Water levels
• What types of responses can automatic control systems involve?

  They may involve nervous responses or chemical responses.
• What are the components of all control systems in homeostasis?

  • Receptors: detect stimuli (changes in the environment)
  • Coordination centres: receive and process information (e.g., brain, spinal cord, pancreas)
  • Effectors: muscles or glands that bring about responses to restore optimum levels
• What is homeostasis?


  Homeostasis is the maintenance of a constant internal environment in order to maintain optimum conditions for enzyme and cellular function.
• What two types of responses are used in body control systems?

  Nervous and chemical responses are used in body control systems.
• What is the function of a receptor?


  Receptors detect changes in the environment (stimuli).
• What is the function of a coordination centre?

  Coordination centres obtain and process information from receptors.
• What is the function of an effector?


  Effectors (muscles or glands) bring about responses to stimuli.