Proximal convoluted, Biology

Assignment Help:

Proximal Convoluted

Tubule The glomerular filtrate, which is isosmotic to plasma, enters the proximal convoluted tubule where its volume is reduced by about 80%. This reduction in fluid v6lume is 'accomplished by the active reabsorption of NaCl, glucose, amino acids, etc. from the tubular fluid. As these solutes are removed, the tubular fluid becomes hypoosmotic and the interstitial fluid surrounding the tubular wall becomes hyperosmotic. This causes passive diffusion of water out of the tubule to restore isosmotic condition between the tubular fluid and the surrounding cortical interstitium.

This reabsorption of water is secondary to solute transport and occurs inevitably irrespective of the water requirements of the body. Hence, it is called the obligatory reabsorption of water. Thus, in the proximal convoluted tubule, there is a drastic reduction in fluid volume without any change in its osmolarity. At the normal plasma glucose concentration of 100 mg per 100 ml, glucose is totally reabsorbed from the ultrafiltrate in the proximal convoluted tubule. If the plasma glucose concentration increases above the .normal level, its concentration in the ultrafiltrate also increases correspondingly. If it exceeds, the capacity of the transport mechanism to reabsorb, some glucose appears in the urine as happens in diabetic patients.


Related Discussions:- Proximal convoluted

How many atp molecules are made after glycolysis, How many ATP molecules ar...

How many ATP molecules are made after glycolysis? Glycolysis is a process same to glucose degradation in fermentation. It forms (final balance) two molecules of ATP for each br

Arthropod classes characterized to the body division, Q. How are the three ...

Q. How are the three major arthropod classes characterized according to the body division? In arachnids and crustaceans the head is fused with the thorax forming the cephalotho

Brain, why left brain controls right side of the body and right brain contr...

why left brain controls right side of the body and right brain controls left side of the body....?????

Social Status and Support Network, Social Status and Support Network ...

Social Status and Support Network Income and Social Status: Higher income and social status lead to better health.Employed persons, having more control over their workin

Define role of nutrients in controlling gene expression, Define Role of Nut...

Define Role of Nutrients in Controlling Gene Expression? The role of several nutrients in controlling gene expression, as mentioned earlier, is in infancy, but with advancing b

Mycoplasmosis-pigs, Pigs Mycoplasma infection causes arthritis in limb ...

Pigs Mycoplasma infection causes arthritis in limb joints in pigs, while infection with M. hyopneumoniae gave rise to symptoms of coughing and chronic pneumonia and the disease

Define control of infections for treatment for pem, Define Control of infec...

Define Control of infections for treatment for pem? Appropriate antibiotics should be started immediately since infections are the immediate cause of death in many children. Ch

Cessation of spontaneous body functions, A person is declared to be dead up...

A person is declared to be dead upon the irreversible cessation of spontaneous body functions; brain activity, or blood circulation and respiration. However,only about 1% of a pers

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