Endotherms Flashcards
which animals maintain core body temp above the surrounding environment
birds and mammals
small endotherms tend to be…
heterotherms
characteristic responses to changes in ambient temperature can be measured in
oxygen consumption
responses to ambient temps depends on what…
depends on environment
to maintain body temp…
modify behaviour - vasoconstrict or dilate capillaries shivering thermogenesis sweat uncoupling protein thermogenin fur or feathers blubber
to cool down…
evaporative cooling - panting / sweating but major water loss
gular flutter
beaks
how do kangaroo rats prevent water loss
through counter current exchanger in the nose - dey air entering gains water and heat, when leaving it cools and water condenses on nasal walls
What is the benefit of birds and mammals undergoing diurnal changes in body temp
core temps lowered at night to save energy
how do mammals and birds, like ectotherms, avoid extreme temperature
hiding or wallowing
huddling - kleptothermy
why is the opah special
first truly endothermic fish
which fish generates heat through constant flapping of pectoral fins and elaborate rete
opah
the thickness of the medulla is linked to what
habitat of the animal
there are thicker medulla in which animals
smaller animals
how are large birds so efficient with water retention
evaporative water loss close to matching metabolic water production
how does the crab eating frog deal with different osmotic conditions in marine environment
storing urea in its tissues
