07 Co Ordination And Homeostatis
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07 Co Ordination And Homeostatis

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07 Co Ordination And Homeostatis Presentation Transcript

  • 1. Co-ordination and Homeostatis Two systems help to coordinate the activities and development of our bodies and keep our internal environment constant . The nervous system, using electrical impulses, and endocrine system, using chemicals called hormones.
  • 2. objectives
    • know that the nervous system uses nerves to communicate information rapidly around the body coordinated by the central nervous system (brain and spinal cord).
    • describe the passage of the nerve impulse through a reflex arc.
  • 3. keywords
    • Neurone
    • Sensory
    • Reflex
    • Motor
    • Intermediate / Relay
    • Synapse
    • spinal cord
  • 4. The nervous system
    • There are 2 parts
    • The CNS – central nervous system
    • The PNS – peripheral nervous system
    • CNS is the brain and spinal cord
    • PNS are the nerves
  • 5. Sensory Neurones
    • Carry information from sense organs (skin, eye, ear, nose, tongue)
    • To the brain
  • 6. Motor neurones
    • Carry information from the brain
    • To effectors (muscles and glands)
  • 7.
    • Stimulus
    • Coordinator
    • Effector
    • response
  • 8. How sensitive are you?
  • 9. Plenary
    • True or false?
    • Nerves are the longest cells of the body
    • The PNS is the brain and spinal cord
    • Motor neurones carry information to the brain
    • Reflexes involve no thinking
    • The skin is the biggest sense organ
  • 10. Reflex arc