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.
Neuron A is a healthy neuron with all the usual ion channels. When at rest with a membrane voltage of R millivolts, neuron A produces no action potentials. The voltage thresh
What is the activation center of an enzyme? Is it the key or the lock of the lock and key model? The activation center is a region of the enzyme formed by its spatial conformat
Drowning: Drowning is a cause of accidental death in children Accidental drowning may occur because children do not have adequate protective supervision. It may be defined
Wet and dry thermal treatment Wet thermal treatment: it is based on exposure of shredded infectious waste to high temperature, high pressure steam. It is inappropriate for the
Give examples of both aerobic and anaerobic exercises Games like foot ball and basket ball, involve both aerobic and anaerobic exercises. As you are aware, in modern times a n
Q. What is genetic engineering? Genetic engineering, It is also known as molecular cloning or gene cloning, is artificial recombination of nucleic acid molecules in a test tube
Q. Which kind of circulatory system do molluscs have? How can it be compared to the respiratory system of annelids? Molluscs, with the exception of cephalopods, have an open ci
What are the major terrestrial biomes? The main terrestrial biomes are: tundra, taigas (or boreal forest), tropical forests, temperate forests, grasslands and deserts.
SEMEN - Sperms and secretion of accesory glands collectively known as seminal fluid or semen. It is milky, semi-solid in nature having particular smell. pH : 7.35 - 7.5. Spe
plants
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd