Ectotherms

Question 1

Thermoconformer

Answer 1

organism whose body temp changes according to extreme temp

Question 2

What allows iguanas to stay for long periods in cold water

Answer 2

low surface area to volume ratio so dont lose heat too quickly

Question 3

ectotherms moving between cold and warm body temps to obtain appropriate body temps

Answer 3

behavioural fever

Question 4

how do frogs stabilise body temp using mucus glands

Answer 4

epidermal wax that melts at 38 degrees

Question 5

why do adults and juveniles live in different thermal envelopes

Answer 5

different sizes so different temperature tolerances

Question 6

ectotherms biochemical adaptations to different temps

Answer 6

increase proportions of unsaturated fatty acids in cell membranes

higher freezing points for fluids in marine fish

cold water fish use glycoprotein and polypeptide anti freezes

ice nucleating proteins in blood proteins - water freezes and blood plasma concentrations increase so draws water out of cells and prevents ice crystal formation

amphibians and lumgfish burrow in mud and form mucus cocoon to prevent water loss

naked mole rats group together to share heat - kleptothermy

Question 7

why does heating occur more rapidly

Answer 7

active component - Blood flow directed to surfave