Urine formation in crustaceans, Biology

Assignment Help:

Urine Formation in Crustaceans

Urine formation in crustaceans involves filtration, re-absorption and secretion. In the end-sac of crayfish antennary gland chloride is reabsorbed from the isosmotic ultrafiltrate during its passage through the tubule so that the final urine excreted is hypoosmotic. Urine concentration is known to vary in crustaceans depending on whether they are freshwater or marine.

It is very dilute in the freshwater crustaceans, but it is close to the blood osmolarity in the crustaceans of brackish water. This may be due to the absence of salt-reabsorbing segment in the tubule of the marine forms. The hydrostatic pressure of the blood provides the driving force for filtration.


Related Discussions:- Urine formation in crustaceans

What is herbicide tolerant crops in ecological, Herbicide tolerant crops (H...

Herbicide tolerant crops (HTC) Increased use of the herbicides plant is tolerant to (describes ecological impact eg toxic residues in soil, runoff into waterways) Ther

Phylum protoza, how these can be called as acellular?

how these can be called as acellular?

Define the herbals, Q. Define the Herbals? During the Middle Ages, foll...

Q. Define the Herbals? During the Middle Ages, following the decline of the Greek and Roman civilisations, little significant botanical progress was made. The early herbals (i.

Why we not inundated with bacterial infections, We are told that every surf...

We are told that every surface we touch is teeming with bacterial cells, and bacteria are found in the pools we swim in, the water we wash with, and on the hands of friends. Why ar

Explain the precautions for use of light microscope, Explain the Precaution...

Explain the Precautions for Use of Light Microscope? 1. Clean the lens system properly. 2. Use xylol only when necessary. 3. Never lower the body tube while looking throu

Physical properties of protoplasm, What is the physical experiment that sho...

What is the physical experiment that show that the protoplasm has contractility?

What is salty taste, Q. What is Salty taste? Various ions both cations ...

Q. What is Salty taste? Various ions both cations and anions are responsible for the salty taste. These include: K (Potassium), Na (Sodium), Li (Lithium), Cl, Br (Bromine), I (

Biotolerant materials, Biotolerant materials, are characterized by a thin f...

Biotolerant materials, are characterized by a thin fibrous tissue interface. The fibrous tissue layer develops as a result of the chemical products from leaching processes, leading

Explain exudate gums, Exudate gums Most exudates gums come from compoun...

Exudate gums Most exudates gums come from compounds  produced when the plant is wounded and these substances seal the wound. Most widely used exudate gum is 'gum Arabic' exuded

Father, who is the father of science

who is the father of science

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