Occurrence of innervation in labral glands ofDaphnia obtusa (crustacea, cladocera)

Autor:	Cristina Zeni, Fulvio Zaffagnini
Rok vydání:	1988
Předmět:	Nervous system Exocrine gland Vesicle Anatomy Biology Synaptic vesicle law.invention Membrane medicine.anatomical_structure law Ultrastructure Biophysics medicine Animal Science and Zoology Electron microscope Free nerve ending Developmental Biology
Zdroj:	Journal of Morphology. 198:43-48
ISSN:	1097-4687 0362-2525
DOI:	10.1002/jmor.1051980106
Popis:	Electron microscopy discloses nerve endings in contact with gland cells situated in the labrum of Daphnia. Swellings of nerve fibers are in close contact with gland cell membranes, either on the cell surface or inserted into infoldings of plasma membrane. The axonal processes are single or double and lack glial wrappings. Inside the nerve fibers are vesicles of different sizes and electron density. These include granular vesicles, which often are dense-cored, and also clearer vesicles. Some presynaptic differentiations lie along the contact line of the axonal process with the gland cell membrane. The significance of the vesicles is discussed in terms of their possible content of biogenic amines, as described in other invertebrates.
Databáze:	OpenAIRE
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