Explain the selective reabsorption process, Science

Assignment Help:

Explain the Selective Reabsorption Process

1. Specialized proteins called 'transporters' are located on the membranes of the various cells of the nephron.

2. These transporters grab the small molecules from the filtrate as it flows by them.

3. Some transporters require energy, usually as ATP (active transport), while others don't (passive transport).

4. Water gets reabsorbed passively by osmosis in response to the build up of reabsorbed Na in spaces between the cells that form the walls of the nephron.

5. Other molecules get reabsorbed passively when they are caught up in the flow of water (solvent drag).

6. Reabsorption of most substances is related to the reabsorption of Na, either directly, via sharing a transporter or indirectly through a solvent drag.


Related Discussions:- Explain the selective reabsorption process

Introduction to fire hazards, INTRODUCTION : In the first unit of this blo...

INTRODUCTION : In the first unit of this block you read about hazards due to electricity and gases in the science laboratories. 'The second unit deals with yet another type of com

Bile pigments and bile salts - abnormal constituent of urine, Bile pigments...

Bile pigments and bile salts - abnormal constituent of urine These occur in urine in conditions of hepatic and obstructive jaundice i.e. obstruction to the flow of bile into th

Differences between tumor staging and tumor grading, Describe the differenc...

Describe the differences between tumor staging and tumor grading, and how each is performed. Relate the role of your particular imaging modality in staging and or grading, if any

Physics, two forces of magnitude 6 N and 4 N act on a 3.2 kg. body. What is...

two forces of magnitude 6 N and 4 N act on a 3.2 kg. body. What is the acceleration produced when these force are acting in the same direction? What it the acceleration produced wh

The arctic circle lies at which latitudes, The Arctic Circle lies at which ...

The Arctic Circle lies at which latitudes: At (66 ½oSouth)

Define age related changes in excretory system, Define age related changes ...

Define age related changes in Excretory System There is a progressive decrease in the number and size of nephrons fiasic unit of the kidney). There is a 10% decrease in renal p

Explain transverse colon and descending colon, Explain Transverse colon and...

Explain Transverse colon and Descending colon Transverse colon: This is a loop of colon which extends transversely across the abdominal cavity in front of the duodenum and th

Foam extinguishers, Foam extinguishers :  If the burning liquid is in a co...

Foam extinguishers :  If the burning liquid is in a container the jet should be directed at the inside edge of the vessel or at a vertical surface in order to break the jet and al

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