2nd October 2019


What is a reflex in anatomy?

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.

What are the components of a reflex arc?

  • Receptor - sense organ in skin, muscle, or other organ.
  • Sensory neuron - carries impulse towards CNS.
  • Interneuron - carries impulse within CNS.
  • Motor neuron - carries impulse away from CNS.
  • Effector - structure by which animal responds (muscle, gland, etc).

Where is the reflex arc found?

A reflex arc is a neural pathway that controls a reflex. In vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord.
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