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Nervous SystemNervous System
By the end of the lesson you should be able to
Describe the transmission of impulses from senses to central nervous system and back to muscles.
Describe the reflex action and the pathway of the reflex arc.
Describe the function of reflex response. Describe the role of the central nervous
system.
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nervous system
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Basic nerve cell Basic nerve cell structurestructure
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3 main types of nerve 3 main types of nerve cellscells
sensory neurone
relay neurone
motor neurone
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Sensory neuronsSensory neurons
Carries impulses from receptors e.g pain receptors in skin to the CNS( brain or spinal cord)
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Relay neuronRelay neuron
Carries impulses from sensory nerves to motor nerves.
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Motor neuronMotor 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
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Transmission of signals
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Reflex arc
reflec arc
more detail reflex
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Reflex arcReflex arc
Grey matter
Sensory Sensory neuroneneurone
Relay neurone
Motor neurone
Effector
(muscle)
Receptors in skin cells
reflex arc bbc
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The Synapse
parkinsons
parkinson
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