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Quarterly Journal of Microscopical Science, Vol s3-94, 281-291, Copyright © 1953 by Company of Biologists

The Relationship of the ‘A’ and ‘B’ Cells of the Pancreatic Islet Tissue of the Grass-snake (Natrix natrix)

E.J. W. BARRINGTON 1

1 Department of Zoology, The University of Nottingham

An account is presented of some cytological characteristics of the pancreatic islet tissue of the grass-snake (Natrix natrix helvetica), based upon supra-vital observations and upon the application of different techniques of fixation and staining. It is concluded that the so-called ‘A’ and ‘B’ cells contain granules of essentially the same type, and that they are stages in a single secretory cycle. It is suggested that the ‘A’ cells constitute a relatively inactive storage phase, while the ‘B’ cells are concerned with the formation and discharge of the final secretory product, free phospholipine becoming demonstrable in association with the granules during this latter phase.






© The Company of Biologists Ltd 1953