UMD General Biology 2 Exam 2
Questions and Answers 100% Pass
osmoconformers - ✔✔isosmotic with their environment, marine invertebrates
osmoregulators - ✔✔adjust internal osmolarity, marine vertebrates, freshwater fish,
terrestrial animals
freshwater fish problems - ✔✔gain water by osmosis, lose electrolytes by diffusion
freshwater fish - ✔✔hypertonic to environment
freshwater fish solutions - ✔✔don't drink water, lots of urine, add electrolytes by diet
and active transport
marine fish - ✔✔hypotonic to ocean
marine fish problems - ✔✔lose water by osmosis, gain electrolytes by diffusion
marine fish solutions - ✔✔drink water, reduced amount of urine, excrete electrolytes by
active transport
anadromous fish - ✔✔hypertonic in freshwater (beginning and end of life), hypotonic I
ocean (middle of life)
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, anadromous fish in salt water - ✔✔pump salt out
anadromous fish in fresh water - ✔✔pump salt in
osmoregulation in land animals problems - ✔✔lose water by evaporation and urination,
lose electrolytes in urine
osmoregulation in land animals solutions - ✔✔drink water, regulate urine production,
add electrolytes through diet
most toxic to least toxic nitrogenous waste - ✔✔ammonia, urea, uric acid
three steps of excretion - ✔✔filtration, reabsorption, secretion
filtration in insects takes place where? - ✔✔malphigan tubules
what is actively transported in the malphigan tubules? - ✔✔K+
reabsorption in insects takes place where? - ✔✔hindgut
filtration in animals takes place where? - ✔✔glomerulus into bowman's space
reabsorption in animals takes place where? - ✔✔proximal tubule, loop of henle,
collecting duct
ascending limb, loop of henle - ✔✔impermeable to water, permeable to electrolytes
descending limb, loop of henle - ✔✔permeable to water, impermeable to electrolytes
Brittie Donald, All Rights Reserved © 2025 2
Questions and Answers 100% Pass
osmoconformers - ✔✔isosmotic with their environment, marine invertebrates
osmoregulators - ✔✔adjust internal osmolarity, marine vertebrates, freshwater fish,
terrestrial animals
freshwater fish problems - ✔✔gain water by osmosis, lose electrolytes by diffusion
freshwater fish - ✔✔hypertonic to environment
freshwater fish solutions - ✔✔don't drink water, lots of urine, add electrolytes by diet
and active transport
marine fish - ✔✔hypotonic to ocean
marine fish problems - ✔✔lose water by osmosis, gain electrolytes by diffusion
marine fish solutions - ✔✔drink water, reduced amount of urine, excrete electrolytes by
active transport
anadromous fish - ✔✔hypertonic in freshwater (beginning and end of life), hypotonic I
ocean (middle of life)
Brittie Donald, All Rights Reserved © 2025 1
, anadromous fish in salt water - ✔✔pump salt out
anadromous fish in fresh water - ✔✔pump salt in
osmoregulation in land animals problems - ✔✔lose water by evaporation and urination,
lose electrolytes in urine
osmoregulation in land animals solutions - ✔✔drink water, regulate urine production,
add electrolytes through diet
most toxic to least toxic nitrogenous waste - ✔✔ammonia, urea, uric acid
three steps of excretion - ✔✔filtration, reabsorption, secretion
filtration in insects takes place where? - ✔✔malphigan tubules
what is actively transported in the malphigan tubules? - ✔✔K+
reabsorption in insects takes place where? - ✔✔hindgut
filtration in animals takes place where? - ✔✔glomerulus into bowman's space
reabsorption in animals takes place where? - ✔✔proximal tubule, loop of henle,
collecting duct
ascending limb, loop of henle - ✔✔impermeable to water, permeable to electrolytes
descending limb, loop of henle - ✔✔permeable to water, impermeable to electrolytes
Brittie Donald, All Rights Reserved © 2025 2
