The body detects this - Stimulus, These detect stimuli - Receptors, These carry out responses - Effectors, These carry messages - Nerves, The messages are... - Electrical, The brain is known as the - Coordinator, These are quick so you don't hurt yourself - Reflexes, Reflexes don't involve the... - Brain, A reflex involving the eyes is.. - Blinking, Effectors are usually.. - Muscles,

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