. Animal hormones; a comparative survey. Hormones. § SECRETORY CELLS FROM THE NERVOUS SYSTEM 27 verge on a half open cavity in communication v^ith the adjacent blood sinus. In the blue crab, Callinectes, there is evidence that the sinus gland is composed of as many as five groups of axon endings, each with a distinctive staining reaction, which can be traced back along the axon (Potter, 1954). It seems highly prob- able that these groups are responsible for secreting and releasing most of the specific chemicals with different hormonal actions, which can be found by experiment in the sinu
. Animal hormones; a comparative survey. Hormones. § SECRETORY CELLS FROM THE NERVOUS SYSTEM 27 verge on a half open cavity in communication v^ith the adjacent blood sinus. In the blue crab, Callinectes, there is evidence that the sinus gland is composed of as many as five groups of axon endings, each with a distinctive staining reaction, which can be traced back along the axon (Potter, 1954). It seems highly prob- able that these groups are responsible for secreting and releasing most of the specific chemicals with different hormonal actions, which can be found by experiment in the sinus gland. NPMT'. Fig. 2-7. Neurosecretory cells (NSC) in the ganglionic-X-organ of a crab, Sesarma. Stained granules of secretion (G) pass down the axons (SGN) to the sinus gland. Some cells (CB) have few granules, others (RC) are almost depleted of granules. Small ganglion cells and nerve fibres (NPMT) of the surroundmg ter- minal medulla are also shown (from Enami, l^.-^l).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Jenkin, Penelope M. Oxford, New York, Pergamon Press
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjecthormones
