The reflex arc
Examples of reflex arcs in humans include responses to pain and blinking.
The order of neurons in a reflex arc is:
The neurons are separated by narrow gaps called A tiny gap at the junction between two nerve cells, which nerve signals must cross.. When an electrical impulse reaches the end of a neuron chemicals are released from it.
The chemicals diffuse across the synapse and trigger an electrical impulse in the next neuron in the circuit.
Stages of a reflex action
Image caption, Stage one
Hand touches hot plate and the high temperature stimulates a pain receptor at the end of a sensory neuron.
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