Match each pain-related concept to its correct functional description: Concepts: 1. Nociception 2. Nociceptor 3. Ascending pathway 4. Descending modulation Descriptions: A. Neural tracts that transmit nociceptive signals from the spinal cord up to the brain B. A specialized sensory neuron that detects potentially tissue-damaging stimuli C. Top-down neural mechanisms originating in the brain that inhibit or facilitate pain signaling D. The neural process of detecting, encoding, and transducing noxious stimuli

### The pairs | Item | Matches | Why | |---|---|---| | Nociception | Detection of potentially harmful stimuli | This term names the detection process that begins the pain-related signal. | | Nociceptor | Specialized sensory neuron that detects noxious stimuli | A nociceptor is the sensory cell that detects potentially harmful stimulation. | | Ascending pathway | Carries pain signals from the spinal cord toward the brain | Ascending routes transmit signals toward brain processing. | | Descending modulation | Brain influence that can alter pain intensity or perception | Descending pathways allow the brain to affect the signal's impact. | ### Terms - **Noxious stimulus**: a potentially harmful stimulus. - **Modulation**: adjustment of a signal's strength or effect. ### Remember Nociceptors detect, ascending pathways carry signals up, and descending pathways can modify them.