____ in the skin detect a stimulus. ____ neurons send electrical impulses to ____ neurons, which are located in the ____. These neurons connect sensory neurons to ____ neurons. Motor neurons relay the electrical impulse to an ____ - for example, a muscle. This produces a ____. Reflex arcs are very quick and ____ (we don't think about them, as the impulses never even go to our brain!) The gap between two neurons is called a ____. The ____ of one neuron will release chemicals called ____ that diffuse across the synapse to reach the ____ of the next neuron. They bind to specific receptors and the impulse continues.

Reflex arcs

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