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Nervous System By the end of the lesson you should be able to

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1 Nervous System By the end of the lesson you should be able to
Describe the basic structure & function of the human nervous system. Describe how the the central nervous system (CNS) & peripheral nervous system (PNS) work together to send information from senses to the CNS and back to muscles by action of the PNS. This Powerpoint is hosted on Please visit for free powerpoints

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3 Neuron – the functional unit

4 3 main types of nerve cells
sensory neuron interneuron motor neuron

5 Sensory neurons Carries impulses from receptors e.g pain receptors in skin to the CNS( brain or spinal cord)

6 Interneuron “Relay neuron”
Carries impulses from sensory nerves to motor nerves.

7 Motor neuron Carries impulses from CNS to effector e.g. muscle to bring about movement or gland to bring about secretion of hormone e.g ADH

8 Nerve Impulse nervous system

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11 Brain components nervous system

12 Build-A-Brain on your Maniken

13 Transmission of signals

14 Reflex arc reflec arc more detail reflex

15 Reflex arc Sensory neurone Relay neurone Grey matter Motor neurone
Receptors in skin cells Relay neurone Grey matter Motor neurone Effector (muscle) reflex arc bbc

16 The Synapse parkinson parkinsons

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