+ Translate
+ Most Popular
The pigeon tick (Argas reflexus): its biology, ecology, and epidemiological aspects
Prevalence of hemoglobin abnormalities in Kebili (Tunisian South)
Lipogranuloma: a preventable complication of dacryocystorhinostomy
Value of basal plasma cortisol assays in the assessment of pituitary-adrenal insufficiency
Bees from the Belgian Congo. The acraensis group of Anthophora
Placing gingival retraction cord
Total serum IgE, allergy skin testing, and the radioallergosorbent test for the diagnosis of allergy in asthmatic children
Acariens plumicoles Analgesoidea parasites des oiseaux du Maroc
Injuries of terminal phalanges of the fingers in children
Biology of flowering and nectar production in pear (Pyrus communis)
Das Reliktvorkommen der Aspisviper (Vipera aspis L.) im Schwarzwald
Hydrological modelling of drained blanket peatland
Pathologic morphology and clinical significance of the anomalous origin of the left circumflex coronary artery from the right coronary artery. General review and autopsy analysis of 30 cases
Cyto genetic analyses of lymphocyte cultures after exposure to calcium cyclamate
Axelrodia riesei, a new characoid fish from Upper Rio Meta in Colombia With remarks concerning the genus Axelrodia and description of a similar, sympatric, Hyphessobrycon-species
Favorable evolution of a case of tuberculosis of pancreas under antibiotic action
RIFM fragrance ingredient safety assessment, Valencene, CAS Registry Number 4630-07-3
Parenteral microemulsions: an overview
Temperate pasture: management for grazing and conservation
Evaluation of a new coprocessed compound based on lactose and maize starch for tablet formulation
Thermal expansion and cracking of three confined water-saturated igneous rocks to 800C
Revision of the genera of the tribe Stigmoderini (Coleoptera: Buprestidae) a discussion of phylogenetic relationships
Anal tuberculosis. Report of a case
Gastric tuberculosis in the past and present
Adaptive responses of the cardiovascular system to prolonged spaceflight conditions: assessment with Holter monitoring

Effect of temperature on central chemical control of ventilation in the alligator Alligator mississippiensis

Effect of temperature on central chemical control of ventilation in the alligator Alligator mississippiensis

Journal of Experimental Biology 179: 261-272

ISSN/ISBN: 0022-0949

PMID: 8340730

Central chemoreceptor function was assessed in unanesthetized alligators, Alligator mississippiensis, at body temperatures of 15, 25 and 35 degrees C. Two experiments were performed. In the first experiment, the fourth ventricle was perfused with mock cerebrospinal fluid (CSF) solutions of different pH values (7.1-7.9). Changes in pulmonary ventilation were evaluated with a pneumotachograph and arterial pH (pHa) was measured. Perfusion with low-pH solutions increased ventilation and arterial pH. Perfusion with high-pH solutions decreased ventilation and arterial pH. Mock CSF pH had a greater effect at higher temperatures. In the second experiment, the relative contributions of central and peripheral chemoreceptor drive to breathing were evaluated using hypercapnic gas mixtures to stimulate both central and peripheral chemoreceptors. Hypercapnia caused an increase in ventilation which was larger at higher temperatures. To stimulate only the peripheral chemoreceptors, the same hypercapnic gas mixtures were applied while the CSF pH of the fourth ventricle was kept constant by perfusion with a mock CSF solution. This reduced significantly the ventilatory response induced by hypercapnia. These data indicate that, regardless of the temperature, central chemoreceptors play a major role in the ventilatory regulation of the alligator. The change in pHa with temperature is compatible with the alphastat hypothesis.

Please choose payment method:

(PDF emailed within 1 workday: $29.90)

Accession: 008548469

Download citation: RISBibTeXText

Related references

The effect of body temperature on ventilatory sensitivity to carbon di oxide in the alligator alligator mississippiensis. Physiologist 24(4): 129, 1981

Effect of temperature on the rates of digestion amino acid absorption and assimilation in the alligator alligator mississippiensis. Comparative Biochemistry and Physiology A 83(3): 585-588, 1986

Distribution of ventilation in American alligator Alligator mississippiensis. American Journal of Physiology 249(4 Pt 2): R477-R481, 1985

Low cost of ventilation in the vagotomised alligator (Alligator mississippiensis). Respiratory Physiology and Neurobiology 159(1): 28-33, 2007

American alligator alligator mississippiensis food habits in north central florida usa. Journal of Wildlife Management 50(2): 348-353, 1986

Changes in cardiovascular control mechanisms during the embryonic development of the American alligator, Alligator mississippiensis. American Zoologist 40(6): 985, 2000

Motor control of locomotor hindlimb posture in the American alligator (Alligator mississippiensis). Journal of Experimental Biology 206(Pt 23): 4327-4340, 2003

Ontogeny of baroreflex control in the American alligator Alligator mississippiensis. Journal of Experimental Biology 206(Pt 16): 2895-2902, 2003

Body temperature null distributions in reptiles with nonzero heat capacity: seasonal thermoregulation in the American alligator (Alligator mississippiensis). Physiological and biochemical zoology: PBZ 76(3): 348-359, 2003

Development of sympathetic cardiovascular control in embryonic, hatchling, and yearling female American alligator (Alligator mississippiensis). Comparative Biochemistry and Physiology. Part A Molecular and Integrative Physiology 165(2): 272-280, 2013

Recruitment of the diaphragmaticus, ischiopubis and other respiratory muscles to control pitch and roll in the American alligator (Alligator mississippiensis). Journal of experimental biology 211(Pt 7): 1141-1147, 2008

The effect of American alligator (Alligator mississippiensis) serum on growth performance of weanling pigs. Poultry Science 86: 80-81, 2007

The effect of American alligator (Alligator mississippiensis) serum on growth performance of weanling pigs. Journal of Dairy Science 90: 80-81, 2007

Evaluating the effect of sample type on American alligator (Alligator mississippiensis) analyte values in a point-of-care blood analyser. Conservation physiology 4(1): cov065, 2016

The effect of chronic saline exposure on the electrolyte balance, nitrogen metabolism, and corticosterone titer in the American alligator, Alligator mississippiensis. Comparative Biochemistry and Physiology. A Comparative Physiology 81(2): 217-223, 1985