Explain the glomerular filtration rate (gfr), Science

Assignment Help:

Explain the Glomerular Filtration Rate (GFR)

The kidneys receive a large amount of blood flow. The kidney blood flow is approximately 1200 ml per minute. One-tenth of this is filtered as the blood flows through the glomeruli i.e., about 120 ml. Filtration takes place through the semi-permeable walls of the glomerular capillaries, which are almost inlpermeable to proteins and large molecules. The filtrate is thus virtually free of proteins and has no cellular elements. The glomerular filtrate is formed by squeezing the fluid through the glomerular capillary bed.

The driving hydrostatic pressure (the pressure exerted by a liquid as a result of its potential energy) is controlled by the afferent and efferent arterioles (the muscular walled vessels leading to and from each glomerulus, and is provided by the arterial pressure, that is, the pressure of the circulating blood on the arteries. The glomerular filtration rate decreases with age and disease. In order to keep the renal blood flow and GFR relatively constant, the hydrostatic pressure in the glomerulus has to be kept fairly constant. When there is a change in the arterial blood pressure, there is a constriction or dilatation of the afferent and efferent arterioles. This process is called as autoregulation and can be more precisely defined as the tendency of the blood flow to organ to remain constant in spite of the pressure changes in the artery that delivers blood to that organ.


Related Discussions:- Explain the glomerular filtration rate (gfr)

Optics used in golden era, Optics: The prevalence of  eye diseases  in t...

Optics: The prevalence of  eye diseases  in the desert and tropical countries led to the study of  the eye by Arab doctors. Surgical treatment of the eye led to renewed interest

Wiring a plug to an appliance, WIRING A PLUG TO AN APPLIANCE In the...

WIRING A PLUG TO AN APPLIANCE In the previous activity, you worked out the operating current of different electrical equipment/appliances and suggested proper fuse and plug

Architecture in golden era, Architecture: The architectural style of  I...

Architecture: The architectural style of  India underwent a drastic  change after the Turkish conquest. The Sultans and their nobles insisted on having arches and domes and com

Life cycle of the sun and plot it on an hr diagram, 1. What is the Solar Ne...

1. What is the Solar Neutrino problem, and what are the possible resolutions of it? Which of these resolutions is now believed to be the most likely explanation? 2.What is the m

Solar system, solar system At night you can see very many stars in the...

solar system At night you can see very many stars in the sky. But during the day, only one star is .visible, and that is  the Sun. This is not because there is anything extrao

Fertilizer, Fertilizers pollute our ____system when____fertilizers run off ...

Fertilizers pollute our ____system when____fertilizers run off from_____and animal______runs off from______and________.

How soap acts towards fat, How soap acts towards fat Prepare another ja...

How soap acts towards fat Prepare another jar with warm water and oil just as you did in the experiment above. This time add about half a cup of either liquid soap or strong so

Explain scurvy, Scurvy  Disease occurs due to vitamin C deficiency.

Scurvy  Disease occurs due to vitamin C deficiency.

Distance, how far does a horse go when running

how far does a horse go when running

Satellite, Satellite : Satellite transmission is one important symbol of...

Satellite : Satellite transmission is one important symbol of revolution in communication technology. Besides transmitting picture and sound over long distances, it has revoluti

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