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Neuroendocrine CellNeuroendocrine cells are a type of cells that have molecular substances that allow them to uptake and release neurotransmitters and neuropeptide hormones. These cells enable autocrine communication both with paracrine and endocrine cells throughout the body. The adrenal medullary cells are connected with the sypathetic division of the autonomic nervous system. These cells are modified postgaglionic nerons. Autonomic nerve fibers lead directly to them from the central nervous system. The adrenal medullary hormones are kept in vesicles much in the same way neurotransmitters are kept in neuronal vesicles. Hormonal effects can last up to ten times longer than those of neurotransmitters. Sympathetic nerve fiber impulses stimulate the release of adrenal medullary hormones. In this way the sympathetic division of the autonomic nervous system and the medullary secretions function together.
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