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

Determine the genotypes of parents, In humans, the recessive allele that ca...

In humans, the recessive allele that causes a form of red-green colour blindness (c) is found on the X chromosome. a) Determine the genotypes and phenotypes of the F1 generation fr

State the stabilization of haem pigments, State the Stabilization of haem p...

State the Stabilization of haem pigments Ligands suggested for the stabilization of haem pigments are imidazole (and its derivatives), S-nitrosocysteine and nitrite. Whereas se

Enhancing the bio-availability of minerals, Mineral supplements and Mineral...

Mineral supplements and Mineral supplements and enhancing the bio-availability of minerals The proper balance of protein, energy, vitamins, and minerals is needed in the ratio

Carbomedics valve-types of valves, Carbomedics Valve :  Almost simila...

Carbomedics Valve :  Almost similar to StJude Medical valve, his is a low profile bileaflet valve made of pyrolitic carbon. On echo cardiography four small jets of regurg

Fuel requirements - deforestation, Fuel Requirements - Deforestation T...

Fuel Requirements - Deforestation The increasing demand for fuel wood is one of the major factors leading to the degradation of the forest ecosystem. Fuel wood is of such majo

Explain the control of air pollution, Explain the Control of Air Pollution ...

Explain the Control of Air Pollution a. Air belongs to everyone Need it to treat air pollution as public problem   b. Air pollution is an inevitable concomitan

Xenotransplantation, X e n o t r a n s p l a n t a t i o ...

X e n o t r a n s p l a n t a t i o n Over the past 20 years transplantation of heart and kidney has become almost a routine in human but the availability of

Reproduction., in oogenesis only on functional egg cell is normally formed ...

in oogenesis only on functional egg cell is normally formed from primary oocyte. Briefly explain

How can we assess the nutritional status of a chd infant, How can we assess...

How can we assess the nutritional status of a CHD infant? Various assessment methods can be used, particularly anthropometrical -weight, length (height), head circumference and

What are the main purpose of changes in life style, What are The main purp...

What are The main purpose  of changes in life style The main purpose  of changes in life style are to: - control blood sugar. - maintain the body weight of the patients.

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