Uricotelism, Biology

Assignment Help:

Uricotelism

In animals which inhabit extremely arid environments, ammonia is converted into  uric acid. Uric acid is least toxic, relatively insoluble and is easily precipitated. Hence, it can be excreted in solid form without loss of substantial amount of water. Pulmonate snails, terrestrial insects, squamate reptiles (lizards and snakes) and birds excrete a major portion of their waste nitrogen in the form of semi-solid or solid uric acid and hence are referred to as uricotelic animals.

1807_Uricotelism.png

Figure: Uric Acid

The synthesis of uric acid from ammonia in these animals occurs by the inosinic acid pathway. This pathway was first elucidated by Buchanan and his co- workers in the 1950s in pigeon liver. Uric acid is a member of the purines. While the details of the pathway are beyond the scope of this unit, in Figure the different fragments from which the uric acid molecule is assembled is shown. The dashed lines which divide the uric acid molecule in the Figure indicate the building blocks from which its biosynthesis takes place.


Related Discussions:- Uricotelism

Explain the steps for injecting insulin injection, Explain the Steps for In...

Explain the Steps for Injecting Insulin Injection It is important to teach patient to take injections at regular times, 30 to 60 minutes before meals. Take insulin everyday, ev

What is telophase, What is telophase? Telophase is the cell divides apa...

What is telophase? Telophase is the cell divides apart and screws itself.

In which strcture sperm cells go after passing epididymides, Q. After passi...

Q. After passing the epididymides through which structures do sperm cells go until exteriorization? After leaving the epididymis in the testicle sperm cells enters the vas defe

Simple precautions to prevent injuries, When resheathing needles, simple pr...

When resheathing needles, simple precautions to prevent injuries are to: 1. use only one hand to scoop the cap 2. hold the sheath with a hemostat (suggested but will require

Coronal disassembly, Coronal disassembly - Coronal restoration in the ...

Coronal disassembly - Coronal restoration in the retreatment phase called coronal deassembling or disassemblying. - Coronal deassembling means removal of coronal and radi

What are varices, What are varices? Why are they more common in the inferio...

What are varices? Why are they more common in the inferior limbs? Varix means abnormal enlargement of veins. Varices happen when excessive pressure against the normal blood fl

Airway management - respiratory failure, Airway Management To improve...

Airway Management To improved ventilation, suctioning, IPPB, Ultrasonic mist therapy and postural drainage with clapping and vibrating are all employed to halt the progress o

What do you mean by handrail support, Many patients who are weak, fearful o...

Many patients who are weak, fearful or shot of breath find it essential to hold tightly to the handrail while walking. If accurate aerobic information is to be obtained handrail su

Enzymes of endoplasmic reticulum, ENZYMES OF E.R. Numerous enzymes have...

ENZYMES OF E.R. Numerous enzymes have been found associated with its membranes, Glucose-6-phosphatase is the marker enzyme of E.R. The chief being those required for the synt

Anther dehiscence and pollen transfer, Anther Dehiscence and Pollen Transfe...

Anther Dehiscence and Pollen Transfer Anther Dehiscence Anther dehiscence simply means the release of pollen grains from dry and mature anthers. It involves the rupturi

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd