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

Lung abscess, Lung Abscess: Lung  abscess  is a localised collection o...

Lung Abscess: Lung  abscess  is a localised collection of pus in  the pulmonary parenchyma as a result of  suppuration and necrosis. The obstruction  of the bronchus of the in

What is h shaped incision and what is its purpose, Q. What is H shaped inci...

Q. What is H shaped incision and what is it's purpose? This type of incision is especially useful for: The anterior maxilla or mandible. Accurately identified implant

Explain the the methods of community and population, What is a community? ...

What is a community? What is the difference among the methods of community and population? A community is a set of populations of living beings that live in the similar region

Pathogens, Give a brief overview of "HIV & Streptococcus Pyogenes" includin...

Give a brief overview of "HIV & Streptococcus Pyogenes" including signs and symptoms. Who is typically affected by this infection?(Children? Immunocompromised patients?)? What is t

What is digestion, What  is digestion? The  ingested food material  is...

What  is digestion? The  ingested food material  is  broken down  into smaller constituents which  are assimilable  by  the  blood.  The  process  through which  the major nutr

Importance of inherited characteristics in their explanation, QUESTION ...

QUESTION Behaviourists underestimate the importance of biological factors such as the inherited factors, by emphasizing the simple approach of Stimulus-Response to explain beha

Non-rapid-eye-movement sleep, Stage 1 sleep: As an individual becomes drows...

Stage 1 sleep: As an individual becomes drowsy, and enters stage 1, alpha wave decreases and theta waves appear. Theta waves with a frequency of about 6 to 8 cycles per second are

Explain the concept of atoms are associated, What is the logical order in w...

What is the logical order in which the concepts of atoms, molecules, cells... up to biosphere are associated? Atoms form molecules that structure cells that form tissues that f

Photosynthesis., what carbohydrates does a plant make from glucose

what carbohydrates does a plant make from glucose

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