Journal ArticleDOI
On the neurosecretory system of Cerebratulus marginatus (Heteronemertini).
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TLDR
This study does not seem to show a relationship between the neurosecretory cells and cerebral organs of Coe, and in certain characteristics the neuro secretory system of Cerebratulus may resemble that of the earthworm.About:
This article is published in General and Comparative Endocrinology.The article was published on 1969-06-01. It has received 20 citations till now. The article focuses on the topics: Neurosecretion & Neuropil.read more
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Journal ArticleDOI
Ultrastructure and histochemistry of neurosecretory cells and neurohaemal areas in the pond snail Lymnaea stagnalis (L.)
TL;DR: Seven types have been distinguished within the class of Gomori-positive cells on the basis of different staining reactions with the alcian blue/alcian yellow technique, which revealed that each of the histochemically distinguished secretory substances consists of elementary granules which differ in size and appearance from each other and from the neurosecretory elementarygranules which have been described in the cerebral ganglia and in the lateral lobes.
Journal ArticleDOI
A survey of neuroendocrine phenomena in non‐arthropod invertebrates
TL;DR: In gastropod molluscs, hormones secreted by the cerebral ganglia, glandular ‘dorsal bodies’ and/or optic tentacles are responsible for the control of the development of the reproductive tract, and the activity of the gonads.
Journal ArticleDOI
The evolution and comparative physiology of terrestrial and freshwater nemerteans
Janet Moore,Ray Gibson +1 more
TL;DR: The relationships between the known terrestrial and semi‐terrestrial nemerteans, comprising seven genera and 15 species, are defined and their geographic distribution is discussed.
Book ChapterDOI
Current Problems in Invertebrate Neurosecretion
Berta Scharrer,Mary C. Weitzman +1 more
TL;DR: Current problems in invertebrate neurosecretion include the elucidation of the neuronal and glandular attributes of neuro secretory neurons, properties of afferent control mechanisms, the chemical nature and mode of release of neurosecretory mediators, the extraneuronal pathways by which they reach their sites of operation, and the manner in which these messengers control their effector cells.
Journal ArticleDOI
The chemical brain hypothesis for the origin of nervous systems.
TL;DR: In this paper, the authors explore a scenario where chemically organized cellular networks appeared before synapses in evolution, a possibility supported by the presence of complex peptidergic signalling in all animals except sponges Small peptides are ideally suited to link up cells into chemical networks They have unlimited diversity, high diffusivity and high copy numbers derived from repetitive precursors.
References
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Function of Neurosecretion in Endocrine Regulation
Francis Knowles,Howard A. Bern +1 more
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Neurosecretion and the brain of the rhynchobdellid leech, theromyzon rude (Baird, 1869).
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The neurosecretory cells of the nervous chain of Eisenia foetida
TL;DR: In each ganglion of the nerve chain of Eisenia foetida there are several types of neurosecretory cells, which are constant in number and strictly localized, and which are only active in worms on their way to sexual maturity.
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The histochemistry of the neurosecretory system in Hirudo medicinalis.
TL;DR: The histochemistry of the neurosecretions of the brain of Hirudo is examined and the secretions of all of the cell types studied are found to be proteinaceous, with possible small carbohydrate and lipid moieties.