respiration in reptiles and amphibians Flashcards
1
Q
define positive pressure ventilation
A
like the use of the buccal cavity in fish, it forces air down to the lungs
2
Q
do reptiles use positive pressure ventilation
A
no they use negative pressure- elastic muscles in abdomen draw air in dots NEGATIVE PRESSURE in lungs
3
Q
what do type 2 alveoli do?
A
provide a surface substance which provides stable lubricated surface for type 1 (respiratory transport surface).
4
Q
what to cog teeth do in crocodile hearts?
A
they reduce the blood pressure then blood is pumped out
5
Q
why did crocodiles change from endo to ectothermy? reference hunting strategy
A
move to ambush predation meant ectothermy was more effective
