Abstract:
:During embryonic development of homeothermic animals like birds and mammals transition from ectothermy to endothermy occurs especially in precocial species of both taxa. Based on some evolutionary aspects of the development of endothermy the review focuses on the prenatal development of endothermy and of the thermoregulatory system using the precocial bird as a model. During final incubation precocial bird embryos have all the prerequisites to respond to environmental (temperature) influences in a nearly appropriate way. Autonomic, neuronal and molecular mechanisms underlying the development of endothermy are established and the transition of the thermoregulatory system from a control system without feedback into a system with feedback mechanisms occurs. Precocial bird embryos are endothermic, but not homeothermic if incubation temperature decreases below the normal level, which seems to be associated with summit metabolism. At increased incubation temperatures the embryos are able to stabilize their body temperature. Therefore, above normal temperatures, homoeothermy can occur over a limited temperature range.
journal_name
Respir Physiol Neurobioljournal_title
Respiratory physiology & neurobiologyauthors
Tzschentke B,Rumpf Mdoi
10.1016/j.resp.2011.06.004subject
Has Abstractpub_date
2011-08-31 00:00:00pages
97-107issue
1eissn
1569-9048issn
1878-1519pii
S1569-9048(11)00205-9journal_volume
178pub_type
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journal_title:Respiratory physiology & neurobiology
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journal_title:Respiratory physiology & neurobiology
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journal_title:Respiratory physiology & neurobiology
pub_type: 杂志文章,评审
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journal_title:Respiratory physiology & neurobiology
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journal_title:Respiratory physiology & neurobiology
pub_type: 杂志文章,评审
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journal_title:Respiratory physiology & neurobiology
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