... genus, which contain a small brown frog, and Aromabates, which consist of one nocturnal aquatic species, however these do not contain lipophilic skin alkaloids. Phyllobates consist of five frogs that produce steroidal alkaloids of batrachotoxin class, where as dendrobates do not produce steroidal alkaloids but instead produce a variety of piperidine - based alkaloids. It's very hard to precisely define an alkaloid, but was traditionally it was defined as; a compound derived from a flowering plant, which contains a basic nitrogen atom and are derived from amino acids. However they are currently defined as any nitrogen containing secondary metabolite. But this leads to the problem of deciding whether they are primary or secondary? These alkaloids may have a variety of functions action as poisons, stimulants, hallucinogens and medicines. Frog derived toxins have been used for centuries by the native populations for tipping their hunting weapons. Dart poison frogs, poison-arrow frogs, ...

See this essay or coursework document in full right now