Gut, hypothalamus, medulla-oblongata, pons, substantia-nigra, and spinal-cord dorsal-root peptides {substance P}| (SP) can be in fine pain fibers and affect peripheral sympathetic catecholamine neurons. Substance P releases serotonin from terminals inhibited by serotonin. Substance P makes long lasting excitation by slow, excitatory postsynaptic potentials and can cause pain. Substance P increases preprotachykinin mRNA. Sympathetic-neuron activity suppresses substance P. Serotonin enhances substance-P release to excite spinal cord.
Biological Sciences>Zoology>Organ>Endocrine Gland>Hormone>Nerve>Gut
4-Zoology-Organ-Endocrine Gland-Hormone-Nerve-Gut
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Date Modified: 2022.0224