General Organization and Functions of Adrenergic Nerves

1975 ◽  
pp. 4-18 ◽  
Author(s):  
Geoffrey Burnstock ◽  
Marcello Costa
Keyword(s):  
Adrenergic Nerves ◽  
General Organization

scholarly journals II.—Description of a Fossil Shark (Ctenacanthus costellatus) from the Lower Carboniferous Rocks of Eskdale, Dumfriesshire

1884 ◽  
Vol 1 (1) ◽  
pp. 3-8 ◽  
Author(s):  
R. H. Traquair
Keyword(s):  
Lower Carboniferous ◽  
General Organization

The deficiency of our knowledge of the organization and configuration of the Palaeozoic Selachii is an unfortunate fact too well known to biologists to render it necessary for me to dilate upon here. Immense numbers of genera and species have been founded upon detached teeth and spines; but as yet very few specimens have occurred, which threw any light upon the general organization and configuration of the ancient possessors of these now scattered relics.

scholarly journals The relationship between innervation and the cholinesterases of the rat atrioventricular node.

1977 ◽  
Vol 25 (1) ◽  
pp. 21-26 ◽  
Author(s):  
I M Taylor
Keyword(s):  
Growth Factor ◽  
Cholinesterase Activity ◽  
Atrioventricular Node ◽  
Adrenergic Nerves ◽  
Specialized Tissue ◽  
The Relationship

During the first 4 postnatal days, the atrioventricular specialized tissue of the rat contains butyrylcholinesterase alone. The next 7 days are associated with a mixture of both acetyl and butyryl activity, but after the 12th day, acetylcholinesterase is found to predominate largely. It is suggested that this change in activity is related to the growth of adrenergic nerves into the heart on the 4th day. Administration of antinerve growth factor prevents the development of these nerves and is found to delay the onset of the change in cholinesterase activity from butyryl to acetyl from the 5th day until the 21st. Only after the 31st day is acetylcholinesterase the most prominent enzyme in treated animals.

The fine structure of the alimentary tract of third-stage larvae of Haemonchus placei and Trichostrongylus colubriformis

Parasitology ◽  
1971 ◽  
Vol 62 (3) ◽  
pp. 355-360 ◽  
Author(s):  
Kenneth Smith ◽  
Eric Harness
Keyword(s):  
Alimentary Tract ◽  
Buccal Cavity ◽  
Secretory Granules ◽  
Intestinal Cells ◽  
Similar Morphology ◽  
Gland Cells ◽  
Dense Bodies ◽  
Third Stage ◽  
General Organization ◽  
Haemonchus Placei

A comparative study was made of defined regions of the alimentary tract of third-stage larvae of T. colubriformis and H. placei. The general organization of the tract was similar in both nematodes. The mouth, buccal cavity and oesophagus were lined with cuticle. Muscle cells, apical cells and gland cells were present in the oesophagus. In both species the gland cells contained secretory granules of similar morphology. The lumen of the intestine was ill-defined and apparently nonfunctional. Dense bodies observed in the intestinal cells differed in the two species.We are grateful to Dr D. W. Brocklesby for his help and advice. We would also like to thank Dr D. L. Lee and Dr W. G. MacMillan for helpful discussions.

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