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.
Define other consideration for Nutrient Requirement and Dietary Management Oral intake is generally feasible only during the anabolic phase wherein the patient should be given
Define Precautions for Determination of Inorganic Phosphorus? 1. All reagents should be added in the order mentioned. 2. Allow 10 minutes for the colour to develop in each t
Why do some physicians advise patients with a bladder infection to drink a lot of cranberry juice? Answer Cranberry juice contains chemicals that kill viruses and bacteria. The inc
Q. What is Atrial Extrasystoles? Atrial premature beats often occur at lower workloads and have little significance. As exercise increases, they usually subside and may then re
Question 1: Explain the importance of Human Genome Project in Research and list the different methods available for Gene sequencing Mention the importance of Human Genome
Define functions of carbohydrate - Protein sparing effect? Carbohydrates help in regulating the protein metabolism. Presence of sufficient carbohydrates to meet energy demands
These are areas where woody shrubs predominate rather then trees. In regions with a Mediterranean type of climate i .e., hot dry summers and cool wet winters, shrubs grow close tog
Q. What is Dyspepsia? Dyspepsia is the most frequent disorder which we all experience some time or the other. Dyspepsia is the term given to a group of gastrointestinal symptom
What is the meaning of Oedema? In some pathological conditions the body is in a positive water balance; that is the intake of fluids is greater than the excretion, and the pati
how can i work with u as an online biology tutor?
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