thermal biology Flashcards
(26 cards)
what is the name of the study of organismic heat budgets ? what is needed for protein function?
thermal biology and optimal heat is needed for protein function
what is the term for when a organisms heat is derived from the env?
ectotherm
what is the term for when a organisms heat is from metabolism ?
endoderm
what is the name for a organism that has little control over heat gain or loss?
poikilotherm
what is the name for a organism that has max control over heat gain or loss?
homeothermic
what is the name for when a organism does both ectothermy and endothermy at different times? what is an example?
heterotherm, and humming birds are an example edodermy by day, ectodermy by night
what is the most common kinds of ectothermy?
poikilothermic ectoderm
what is the name of the type of ectotherm that relies on the external resources of heat to regulate body temp. ? These types are restricted to favorable climate zones
sessile type
what is the type of ectoderm that will seek out a critical temp. ?
motile type
when the surr. temp is close to the internal optimum of a organism, what is the term?
critical temp.
what kind of thermy do some species like lizards attempt to do?
behavioral homeothermy
what is the physio adjustment of ectoderms that is related to when there’s a change in critical temp. and thermal optimal temp.? what is animals is this fastest in?
thermal acclimation, and it is fastest in fish/amphibs
what are the two other physio adaptions of ectoderms? asoss with being cold and heat prod.
restricted blood flow to the skin when cold, and localized tissue specific heat production
what animal is a non-homeothermic type?
large fishes
what kind of thermy type are birds and mammals ?
homeothermic types
what are the last three details of endoderms ?
insulated, high metabolic rates, and optimal body shape to limit heat gain/loss
what is allen’s rule?
animals in colder regions have shorter limbs to avoid heat loss.
how can the size of an animal influence how well a animals holds heat?
surface area can limit heat loss, smaller animals dont hold heat well
what is bergmans rule?
the largest individual birds/mammals with in a species reside in coldest places
what happens to a endoderms blood to skin, metabolic rate, and heat production when it’s too cold?
the blood to skin is decreased
metabolic rate is increased
metabolism of heat generation increased
when a endoderm is too cold, there is a decrease in appendage blood by what?
counter current heat exchange
what is the term for when hot/cold blood can exchange temps. and make cold blood warm?
counter current heat exchange
where does counter current heat exchange happen in fishes?
in rete mirable of the vessels with axial muscles
When too hot what happens to a endoderms blood to skin, metabolic rate, and way of coolings itself?
blood to skin is increased
overall metabolic rate is decreased
evaporative cooling occurs, like sweating or panting (animals)
