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Titolo:
Ventilatory responses to changes in temperature in mammals and other vertebrates
Autore:
Mortola, JP; Frappell, PB;
Indirizzi:
McGill Univ, Dept Physiol, Montreal, PQ H3G 1Y6, Canada McGill Univ Montreal PQ Canada H3G 1Y6 siol, Montreal, PQ H3G 1Y6, Canada La Trobe Univ, Dept Zool, Bundoora, Vic 3083, Australia La Trobe Univ Bundoora Vic Australia 3083 , Bundoora, Vic 3083, Australia
Titolo Testata:
ANNUAL REVIEW OF PHYSIOLOGY
, volume: 62, anno: 2000,
pagine: 847 - 874
SICI:
0066-4278(2000)62:<847:VRTCIT>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACID-BASE STATUS; CENTRAL CHEMORECEPTOR DRIVE; PRESSURE-VOLUME HYSTERESIS; SUPERIOR LARYNGEAL NERVES; CHRYSEMYS-PICTA-BELLII; CONSCIOUS NEWBORN RAT; RESPIRATORY HEAT-LOSS; HERING-BREUER REFLEX; BODY-TEMPERATURE; AMBIENT-TEMPERATURE;
Keywords:
body temperature; control of breathing; hyperthermia; hypothermia; respiration;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
185
Recensione:
Indirizzi per estratti:
Indirizzo: Mortola, JP McGill Univ, Dept Physiol, 3655 Drummond St, Montreal, PQ H3G 1Y6, Canada McGill Univ 3655 Drummond St Montreal PQ Canada H3G 1Y6 Canada
Citazione:
J.P. Mortola e P.B. Frappell, "Ventilatory responses to changes in temperature in mammals and other vertebrates", ANN R PHYSL, 62, 2000, pp. 847-874

Abstract

This article reviews the relationship between pulmonary ventilation ((V)over dot E) and metabolic rate (oxygen consumption) during changes in ambienttemperature. The main focus is on mammals, although for comparative purposes the (V)over dot E responses of ectothermic vertebrates are also discussed. First, the effects of temperature on pulmonary mechanics, chemoreceptors, and airway receptors are summarized. Then we review the main (V)over dot E responses to cold and warm stimuli and their interaction with exercise, hypoxia, or hypercapnia. In these cases, mammals attempt to maintain both oxygenation and body temperature, although conflicts can arise because of therespiratory heat loss associated with the increase in ventilation. Finally, we consider the (V)over dot E responses of mammals when body temperature changes, as during torpor, fever, sleep, and hypothermia. In ectotherms, during changes in temperature, (V)over dot E control becomes part of a general strategy to maintain constant relative alkalinity and ensure a constancy of pH-dependent protein functions (alphastat regulation). In mammals on theother hand, (V)over dot E control is aimed to balance metabolic needs withhomeothermy. Therefore, alphastat regulation in mammals seems to have a low priority, and it may be adopted only in exceptional cases.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 09:22:57