Reflexes - Reflexes Areflexisarapid,involuntaryresponse...

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Reflexes A reflex is a rapid, involuntary response  to a stimulus. A reflex arc is the  pathway traveled by the nerve impulses  during a reflex. Most reflexes are spinal  reflexes with pathways that traverse  only the spinal cord. During a spinal  reflex, information may be transmitted  to the brain, but it is the spinal cord, not  the brain, that is responsible for the  integration of sensory information and a  response transmitted to motor neurons.  Some reflexes are cranial reflexes with  pathways through cranial nerves and  the brainstem.
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components, shown in Figure 1: The receptor is the part of the  neuron (usually a dendrite) that  detects a stimulus. The sensory neuron transmits  the impulse to the spinal cord. The integration center involves  one synapse (monosynaptic  reflex arc) or two or more  synapses (polysynaptic reflex 
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Reflexes - Reflexes Areflexisarapid,involuntaryresponse...

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