Topic 5 - Homeostasis and Response

    Cards (10)

    • homeostasis
      maintaining a stable internal environment despite changing conditions
    • receptors(eg. skin receptors)detect a change in your bodys temperature
    • co-ordination centres(brain or spinal chord) interpret the change and organises a responce
    • effectors (muscles contracting or glands that release hormones) carry out the change
    • nervous system sends fast and precise impulses through nerves which allow us to respond to things very quickly
    • hormones are chemical messengers released by glands into the blood and carried to a organ or organs
    • the endocrine system relies on hormones(which travel through the entire body). However hormones only effect certain cells that have the right receptors.
    • The endocrine system is slower and longer lasting than the nervous system
    • negative feedback is when the body responds to a change in the environment to restore the original condition
    • the body needs to maintain optimal conditions for optimal enzyme action and for cells to function
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