A patient touches a hot metal surface and quickly withdraws the hand before consciously feeling pain. Which structure serves as the main integration centre for this reflex?
Correct answer: B. Spinal cord
- A. Cerebral cortex
- B. Spinal cord
- C. Cerebellum
- D. Medulla oblongata
Explanation
The spinal cord integrates the rapid withdrawal reflex before conscious pain perception occurs in the cerebral cortex. The brain receives information afterward, but immediate withdrawal does not require cortical processing.
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About Nervous System and Special Senses
The nervous system covers neurons, neuroglia, nerve impulses, synapses, reflex arcs, and the organization of the central and peripheral nervous systems. It also explains the autonomic divisions and the receptors and pathways for vision, hearing, balance, taste and smell, distinguishing sensory reception from conscious perception.
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