Pancreatic islet cytology of ictaluridae (Teleostei) |
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Authors: | Dr Jack E Brinn |
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Institution: | (1) Department of Anatomy, School of Medicine, East Carolina University, 27834 Greenville, North Carolina, USA |
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Abstract: | Summary The endocrine pancreas of the bullhead catfish, Ictalurus nebulosus, and the channel catfish, I. punctatas was studied by light and electron microscopy. In addition to the usual A, B and D cells, a fourth endocrine cell type was consistently observed in the electron microscope. All endocrine cell types were innervated. The vesicles of most of the nerve endings were ultrastructurally different from typical adrenergic and cholinergic vesicles, strongly suggesting the possibility of a third autonomic neurotransmitter serving as a regulator of catfish islet secretion.Supported in part by PHS grant AM 11407 awarded to Dr. Bryce Munger. |
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Keywords: | Catfish Endocrine pancreas Cell types Innervation Electron microscopy |
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