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Biol Bull 122: 431-438. (June 1962)
© 1962 Marine Biological Laboratory
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RESPONSES OF SPECIFIC NEUROSECRETORY CELLS OF THE COCKROACH, BLABERUS GIGANTEUS, TO DEHYDRATION

BETTY J. WALL 1 and C. L. RALPH 1

1 Department of Biological Sciences, University of Pittsburgh, Pittsburgh 13, Pennsylvania

Regulation of water content in the cockroach, Blaberus giganteus, may be influenced by the secretions of specific neurosecretory cells. Under conditions causing dehydration (a) the type A cells of the pars intercerebralis show greater than normal amounts of stainable granules, and (b) the type A cells of the thoracic ganglia show clumping of granules toward the surface adjacent to a trachea and have a coagulated-appearing cytoplasm. Salt injections of 4 x NaCl in Hoyle's solution produced the same cytological appearances as dehydration. Specific cytological changes were not seen in any other neurosecretory cells.






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