Define obligatory and facultative water excretion, Biology

Assignment Help:

Define Obligatory and Facultative water excretion?

i) Obligatory water excretion: The kidney is 'obligated' to excrete some water to rid the body of its daily load of urinary solutes; the body's excretory system is designed to maintain the necessary balance through its filtering and selective reabsorbing system in the kidneys. About 15 ml of water is required to dissolve 1g of solute materials arising out of the metabolism. The quantity of obligatory water excretion depends on the load on the metabolic products - chiefly urea and sodium chloride. The average adult obligatory water excretion is about 900 ml.

ii) Facultative water excretion: In addition to obligatory water loss, an additional 500 ml, more or less water is excreted for maintaining water balance.


Related Discussions:- Define obligatory and facultative water excretion

Existence value of biodiversity, There may also be non-use existence values...

There may also be non-use existence values for components of biological diversity due to the value placed on biodiversity purely based on its continued existence, irrespective of w

Self-pollination - types of pollination, Self-Pollination - Types of Pollin...

Self-Pollination - Types of Pollination Self-pollination refers to the transfer of pollen grains from the anther to the stigma of the same flower. In chasmogamous flowers the

Explain differences between thrombus and embolus, Explain the differences b...

Explain the differences between a thrombus and an embolus. Include predisposing factors, mechanism of occurrence, treatment, and methods of detection with medical imaging, if any.

Animal and plant cells, Animal and Plant Cells The internal structural ...

Animal and Plant Cells The internal structural organisation and information related with hereditary characters and metabolic pathways are similar in all eucaryotic cells whethe

Indications for surgery-pericardial diseases, Indications for Surgery :  O...

Indications for Surgery :  Once diagnosis of constrictive pericarditis is made and confirmed by chest X-ray, ECG, echocardiogram, CT, MRI scan, cardiac catheterisation and angio,

Explain the function of the pupil and of the iris, Q. What is the function ...

Q. What is the function of the pupil and of the iris? The iris works like the diaphragm of a photographic camera since it has muscles that relax or contract varying the pupil d

Solid fuels, Primary and secondary solid fuels are widely used in domestic ...

Primary and secondary solid fuels are widely used in domestic and industrial purpose. Wood and coal constitute the important primary solid fuels. The important secondary solid fuel

Iceberg phenomenon in relation to diabetes, Q. Iceberg phenomenon in relati...

Q. Iceberg phenomenon in relation to diabetes? Diabetes Mellitus cases are diagnosed by a doctor or a health worker by taking history, blood test for sugar level. But the undia

Biotechnology... what is the answer/, At a biotechnologist, employment oppo...

At a biotechnologist, employment opportunities can be found in many areas. In addition to biotechnology companies, where can a scientist with a biotechnology background find employ

Serotonin - enhancement of memory, Q. Serotonin - Enhancement of memory? ...

Q. Serotonin - Enhancement of memory? Increased level of serotonin is implicated in the enhancement of memory. It plays a significant role in classical conditioning wherein sti

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