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

What are the near point and the far point of the vision, Q. What are the ne...

Q. What are the near point and the far point of the vision? The near point is the closest distance between the eye and an object that makes possible the formed image to be focu

Intervention strategy, Intervention Strategy There are five basic ways...

Intervention Strategy There are five basic ways in which government can correct market failures and ensure equity: inform, regulate, mandate, finance and deliver health care s

Mechanism of cleavage, Mechanism of Cleavage Such as the mitotic divi...

Mechanism of Cleavage Such as the mitotic division in any cell, cleavage is the result of two events: mitotic nuclear division (Karyokinesis) followed via cytoplasmic divisio

Explain about lactose intolerance, Q. Explain about Lactose Intolerance? ...

Q. Explain about Lactose Intolerance? We commonly hear from people of all age groups, particularly children and elderly to be complaining of abdominal discomfort after consumin

Aibp-utilization of alternate feed resources, Utilization of Alternate Feed...

Utilization of Alternate Feed Resources Use of alternate feed resources is one of the potential areas for augmenting feed resource base in the country. However, the use of NCF

In which environments bacteria live, Q In which environments bacteria live?...

Q In which environments bacteria live? Bacteria can be found in a variety of environments throughout the planet. There are bacteria in the air, on the surface, in fresh water,

Explain about the chemical carcinogens, Explain about the Chemical Carcinog...

Explain about the Chemical Carcinogens? Chemicals have been shown to be carcinogenic. Some are naturally occurring components of plants and microbial organisms. Some are synthe

Show photosynthesis process in algae and plants, Q. Which all are the livin...

Q. Which all are the living beings that carry out photosynthesis? Which is the cell organelle responsible for the absorption of light for the photosynthesis process in algae and pl

Define aim of neotaxonomy or systematic or biosystematics, Define Aim of Ne...

Define Aim of Neotaxonomy or Systematic or Biosystematics The aim of neotaxonomy or systematic or biosystematics is not only to describe, identify and arrange organisms in conv

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