Osmoregulation and Disposal of Metabolic Wastes Flashcards
Osmoregulation (water and solute balance)
active regulation of osmotic pressure of body
fluids
maintains fluid and electrolyte homeostasis
Excretion
process of ridding body of metabolic wastes
Ammonia (toxic) excreted mainly by
aquatic animals
Urea (less toxic)
synthesis requires _____
excretion requires _____
energy, water
Uric acid (less toxic) excreted as
semisolid paste (conserves water
Osmoconformers
Most marine invertebrates
Salt concentration of body fluids varies with changes in sea water
Nephridial Organs Help maintain homeostasis by
regulating concentration of body fluids
osmoregulation
excretion of metabolic wastes
Protonephridia are found in
flatwoms
Metanephridia are found in
earth worms
Malpighian Tubules found in
insects
Structure and function of vertebrate kidney adapted to
various osmotic challenges of
different habitats
Marine Mammals
Ingest sea water with their food produce a
concentrated urine
usable water is a byproduct
of metabolism
Terrestrial Vertebrates
Must conserve
water adaptations include efficient kidneys
Endotherms have a high
metabolic rate
produce large volume of nitrogenous wastes
kidney urea pathwaty
kindney-> urerters->bladder-> ureuthra