Homeostasis

• definition- AUTOMATIC regulation of internal conditions so that the cell/organism can maintain optimum conditions - USED TO KEEP THE BLOOD GLUCOSE CONCENTRATION/BODY TEMP/WATER LEVELS CONSTANT
• Automatic control systems (keeping things constant automatically) -

  • RECEPTOR CELLS detect changes in the body (the change is a STIMULUS)
  • the receptor cells pass info to a COORDINATION CENTRE (eg. Brain/spinal cord/pancreas)
  • coordination centre processes info and sends instructions to EFFECTOR (effector is muscle or a gland) and its job is to carry out the RESPONSE and RESTORE OPTIMUM LEVEL