Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Juxtaglomerular Apparatus
The autoregulation of renal blood flow involves a neuroendocrine mechanism related to the juxtaglomerular apparatus in the kidney.
Figure: Structure of the juxtaglomerular apparatus in mammals
When the afferent arterial blood pressure is low, the stretch sensitive receptors of the arterioles initiate nerve impulses which induce the secretion of a proteolytic enzyme called renin by the juxtaglomerular cells into the blood. This enzyme causes the release of a decapeptide called angiotensin-I from a large globular plasma protein known as angiotensinogen. Another proteolytic enzyme from the plasma, the converting enzyme, removes two amino acids from angiotensin-I to form an octapeptide called angiotensin-II. Angiotensin-II is about 200 times more powerful than norepinephrine in its lasopressor activity. It increases the blood pressure by two mechanisms. Firstly, it acts on the smooth muscle of the arterioles and causes strong vasoconstriction. Secondly, it stimulates the secretion of aldosterone by the adrenal cortex. Aldosterone enhances the uptake of Na+ by the kidney tubules and hence causes a rise in the plasma Na+ level. This results in an increase in the extracellular fluid volume and consequently an elevation in blood pressure. Angiotensin-II is degraded by an enzyme called Angiotensinase, present in plasma.
Transfer of pollen grains from the anther to the stigma of another flower of the similar plant is known as? Geitonogamy
Ask question #Mcharacteristics of xerophytesinimum 100 words accepted#
in natural vegetative propagation which structure gives rise to new individuals?
Despite its importance, determining the value or worth of biodiversity is complex and often a cause for debate. This is largely due to the fact that the worth placed on biodiversit
Q. What is the ecological importance of fungi? Fungi are decomposers and heterotrophs they break down dead beings and they actively participate in the recycling of organic mate
Circulatory system, closed is a system which uses a continuous series of the vessels of different sizes to deliver blood to body cells and return it back to the heart; it is found
Q. Write the meaning of Metabolism? Metabolism is the set of chemical reactions that occur in living organisms in order to maintain life. These processes allow organisms to gro
Name the most important allosteric effector of glycolysis in the liver. Fructose-2,6-bisphosphate is the most important allosteric effector of glycolysis in the liver
Agriculture, industry, and growing populations of cities all compete, through political influence, for water. If you were in charge of water resources in an arid region, what would
Composition of blood: Take few ml. of fresh blood in a test tube and before collecting the blood add a few drops of sodium oxalate or sodium citrate solution to prevent clot
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd