Bio 193 Osmoregulation
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12 Terms
animals must maintain stable levels of
water and solutes
water gain causes
cell lysis
water loss causes
cell shrinkage
osmoregulation
regulation of cellular water content and solute levels
excretion
disposal of toxic metabolic waste products
the type of waste excreted is dependent on
lifestyle and habitat
amount of waste excreted is dependent on
diet and metabolic rate
Ammonia
must be excreted as large volumes of dilute soln (high toxicity)
fish pump ___ out of their gills
ammonia
mammals/amphibians have limited water access,
the liver converts ammonia to less toxic urea for excretion
kidneys filter
urea from the blood to excrete in urine
uric acid
excreted by insects, reptiles, and birds as a paste (energy costly)