osmoregulation Flashcards
marine animals
invertebrates are osmoconformers
vertbretesare osmoregulators
hyposmotic- lose water by osmosis and gain salt by diffusion and food
balance water loss by drinking water and excerting salts
freshwater animals
constantly take in water and lose walt by diffusion
anhydrobiosis
when animals lose all water, but survive in dormant state
ammonia
animals that excrete ammonia need lots of water, easiest
urea
less toxic
needs less water
uric acid
insoluble in water and pasty
more energetically expensive than urea
filtration
save the big stuff
reabsorption
spend energy getting back the valuable little things
secretion
get other bad stuff out of the blood
excretion
dump waste
protonephridium
network of dead end tubules connected to external openings
capped by cellular unnit called a flame bulb
metanephridia
collect coelomic fluid and produce dilute urine
malphighan tubules
remove nitrogenous wastes from hemolymph and function in osmoregulation
glomerulus
single long tubule and bowmans capsule
vasa recta
capillaries that serve the loop of henle