Reflex Arcs & Synapses
Reflex actions are automatic and rapid; they do not involve the conscious part of the brain.
How does information cross a synapse?
What is Reflex Arcs & Synapses?
"A reflex arc is the nerve pathway involved in a reflex action, often involving a sensory, relay, and motor neurone."
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Automatic Responses
Reflex arc path: Receptor -> Sensory neurone -> Relay neurone -> Motor neurone -> Effector.
Synapses are gaps between neurones where chemicals (neurotransmitters) diffuse across.
Reflexes protect the body from harm (e.g. pulling a hand away from a hot object).
The relay neurone is found in the CNS (spinal cord or unconscious brain) and connects sensory directly to motor.
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