English National Curriculum - Science
Mission Objectives
Describe the stages of a reflex action
Describe the types of neurons and explain the role of chemicals at synapses
Describe the differences between voluntary and reflex actions
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Words and meanings to learn
synapse
the small gap between two neurones where a neurotransmitter diffuses across to transmit an impulse
neurotransmitter
chemical released from the end of a neurone that diffuses across a synapse to transmit a signal to the next neurone
reflex
a rapid, automatic response to a stimulus that does not involve conscious thought
reflex arc
the pathway taken by nerve impulses during a reflex action from the receptor to the effector
relay neurone
a neurone found in the central nervous system that connects sensory neurones to motor neurones
Handouts
Expert film
Mission assignment film
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