Journal ArticleDOI
Adrenomedullary and glycemic alterations following diverse stress in soft-shelled turtles Lissemys punctata punctata Bonnoterre.
Reads0
Chats0
TLDR
It is suggested that dehydration and formalin stresses might have exerted their actions through the hypothalamo (CRF)–hypophysial (ACTH)–adrenocortical axis in turtles.Abstract:
The objective of the current investigation was to study adrenomedullary and glycemic responses to stress in soft-shelled turtles, Lissemys p. punctata. Dehydration (7 days) and formalin (formaldehyde 1%, 0.1 mL/100 g body wt. daily for 7 days) stress-stimulated adrenomedullary activity at histological (by increasing the nuclear diameter and degranulation of chromaffin cells) and hormonal levels (by elevations of norepinephrine and epinephrine concentrations) with hyperglycemia in turtles. But salt loading (NaCl: 1%, 1 mL/100 g body wt. daily for 7 days) had no significant effect on adrenomedullary activity or glycemia presumably owing to the nonresponsiveness of adrenocortical activity to salt stress in turtles. It is suggested that dehydration and formalin stresses might have exerted their actions through the hypothalamo (CRF)–hypophysial (ACTH)–adrenocortical axis in turtles.read more
Citations
More filters
Journal ArticleDOI
The autonomic nervous system and chromaffin tissue: Neuroendocrine regulation of catecholamine secretion in non-mammalian vertebrates
TL;DR: Catecholamine secretion from teleost chromaffin cells is regulated by a host of cholinergic and non-cholinergic pathways that ensure sufficient redundancy and flexibility in the secretion process to permit synchronized responses to a myriad of stressors.
References
More filters
Journal ArticleDOI
The fluorometric assay of catecholamines and related compounds: improvements and extensions to the hydroxyindole technique.
R. Laverty,K.M. Taylor +1 more
TL;DR: A fluorometric hydroxyindole assay method for a wide range of catecholamines and related compounds has been developed based on iodine oxidation, alkaline rearrangement, and subsequent measurement of the fluorescence of the final solution at an acid pH.
Journal Article
Adrenocortical control of epinephrine synthesis
TL;DR: Adrenal medulla biochemistry and morphology, discussing epinephrine synthesis control by glucocorticoid hormones.
Journal ArticleDOI
A sensitive, rapid and simple method for the simultaneous spectrophotofluorometric determinations of norepinephrine, dopamine, 5-hydroxytryptamine and 5-hydroxyindoleacetic acid in discrete areas of brain
R. H. Cox,J. L. Perhach +1 more
TL;DR: The fluorometric procedure developed in the laboratory allows the rapid determination of the levels, in a single sample, of what are considered to be the major biogenic amines-norepinephrine, dopamine, and serotonin, as well as the latter’s major metabolite, 5-hydroxyindoleacetic acid.
Journal ArticleDOI
Catecholamine output in school children as related to performance and adjustment
TL;DR: Significant positive correlations were found between the secretion of both catecholamines and teachers' ratings indicating good social adjustment and emotional stability, as well as with measures of the pupils' subjective satisfaction with their school environment.
Book ChapterDOI
Relationship between catecholamines and other hormones.
TL;DR: The relationship between catecholamines and other hormones is discussed, including the presence of adrenergic tracts where cell bodies originate in the midbrain and send axons into parts of the hypothalamus.