Osmoregulation Flashcards
the concentration of urine is linked to what features of the kidney
length of tubules
thickness of medulla
how did marine reptiles and birds evolve to deal with excess salt
specialised salt glands which remove salt by active transport. involved secretary epethilium and countercirrent exchangers
triploblastic
3 embryonic cell layers - endoderm ectoderm mesoderm
why was moving from marine to freshwater challenging
different abundance of salt in environment
why do sharks fill tissues with urea
match osmotic pressure of surrounding pressure of water
in sharks salt is excreted through the…
renal salt gland
how do tubules become more developed in tetrapods
separates from coelom completely
in amphibians how are the proximal and distal tubules different
proximal highly permeable to water so not change in osmotic pressure
distal is not so only ions at pumped out - deviate more and more from osmotic pressure
what ensures interstitial fluid doesnt get washed away
vasa recta
