Final answer:
Reflexes are simple, rapid, involuntary, unlearned, and predictable motor responses to a stimulus. They are innate behaviors controlled by the spinal cord and involve specific body parts and systems.
Step-by-step explanation:
Reflexes are simple, rapid, involuntary, unlearned, and predictable motor responses to a stimulus. They are innate behaviors that organisms are born with and involve the activity of specific body parts and systems. Reflexes bypass the brain and are controlled by the spinal cord and more primitive centers of the central nervous system.