1 / 9

Nitrogen Excretion

Nitrogen Excretion. Nitrogen excretion is necessary due to amino acid breakdown. Ammonia. Excreted as NH 3 or NH 4 + NH 3 passively diffuses NH 4 + needs transporters Most fish, simple invertebrates, molluscs, sharks (live in water) Expends little energy. Uric Acid. Highly concentrated

dawson
Télécharger la présentation

Nitrogen Excretion

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Nitrogen Excretion Nitrogen excretion is necessary due to amino acid breakdown

  2. Ammonia • Excreted as NH3 or NH4+ • NH3 passively diffuses • NH4+ needs transporters • Most fish, simple invertebrates, molluscs, sharks (live in water) • Expends little energy

  3. Uric Acid • Highly concentrated • Requires energy to produce • Less toxic than ammonia • Birds, reptiles, insects

  4. Urea • Less toxic than ammonia • Much energy needed to produce it • Made in liver, released into bloodstream, excreted primarily in kidney • All mammals, some bony fish

  5. Variations • Lungfish can convert from ammonia excretion to urea excretion depending on surroundings (water vs. air)

More Related