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Unformatted text preview: Substance P is 11 amino acids long. Pain nerves are small, unmyelinated, slow-conducting, non-adapting as long as the injury is present. The white association neuron is stimulated, sends its own action potentials to the thalamus (lateral spinothalamic tract) PAIN Nerve endings are bare and respond to damage (ions flow in), and surrounding tissues release bradykinins when damaged. This depolarizes pain nerves, too. Pain perception= NOCICEPTION. See endorphins.doc or endorphins.ppt for details...
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- Spring '10
- Neurotransmitter, ye ally ce