The major nitrogenous waste of bony fishes is ( ).
A: ammonia
B: urea
C: uric acid
D: guanine
E: creatine
A: ammonia
B: urea
C: uric acid
D: guanine
E: creatine
举一反三
- Which of the following is the end production of purine nucleotide catabolic metabolism? A: urea B: creatine C: creatinine D: uric acid E: β-alanine
- Under the condition of taking allopurinol to cure gout, ( ) are the main excreted compounds instead. A: Urea B: Uric acid C: Hypoxanthine D: Xanthine
- Early members of the class Reptilia were the first to produce( ). A: neotenic larvae B: amniotic eggs C: urea as a nitrogenous waste D: tadpole larvae E: isolecithal eggs
- The main cause of inadequate ammonia clearance at severe hepatic dysfunction is ( ) A: Impairment of glutamine synthesis B: Impairment of urea synthesis C: Impairment of acetylcholine synthesis D: Impairment of glutamic acid synthesis E: Impairment of γ-aminobutyric acid synthesis
- The modern bony fishes are the ( ). A: lepisosteans B: holocephalans C: teleosts D: holosteans E: chondrosteans