Animal Physiology - Lecture 12 Flashcards
radiation is heat exchange .. contact, resulting in .. total heat loss
without, 60%
conduction is heat exchangeg .. contact, resulting in .. total heat loss
with, 3%
convection is the movement of ../.. across body surface, resulting in .. total heat loss
air/fluid, 15%
evaporation is the movement of .. from body surface, resulting in ..% total heat loss
water, 22%
larger animals have .. SA:V so lose heat .. quickly
smaller, less
ectotherms and polikotherm body temperature .. with the environment, they confrom to it
fluctuates
-may still regulate temperature using physiological processes like shivering
endotherms/homeotherms .. their body temperature, deriving their heat from metabolism
regulate
-may still regulate temperature behaviourally
ectotherm metabolic rate is x.. slower than endotherms
due to this they can more easily … dry/poor environments
x5, colonise
- they consume less energy, food and water
- can devote more energy to reproduction
ectotherms don’t have … environmental niches and their energy is in bursts, leaving them vulnerable to endotherm … predators
nocturnal
sustained
-anaerobic respiration causes rapid fatigue in ectotherms
-ectotherm predators are typically ambush
endotherms can more easily exploit .. environments and forage/move over more sustained, … distances
colder, longer
thermal neutral zone is the zone in which an organism does .. need to expend energy to maintain body temperature
not
vasoconstriction is the constriction of blood vessels, … heat loss
reducing
-moves blood away from skin, heat trapped in body ocre
shivering increases heat production by ..
500%
adrenaline.. heart rate
increases
thyroxine .. basal metabolic rate
increases
