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.
Enumerate the term - Clinical neuroscience Clinical neuroscience concerns the study of clinical populations both to well understand neuroanatomy and to test psychological theor
Question 1: (a) In what ways does poverty lead to environmental degradation? (b) What types of problems do the rural and urban poor share? Give some differences in the condi
Ecology Very often a word has a precise well-defined meaning in scientific literature but is loosely used in everyday language. It is, therefore, necessary for you to be clear
In marked contrast to prokaryotic genes where proteins are encoded by a continuous sequence of triplet codons and the vast popular of protein-coding genes in eukaryotes are discont
Define Preparation of Dilutions - Standard or Total Plate Counts? 1. Serial dilution of homogenized sample in an appropriate diluent. Preparation of dilutions - Decimal dilu
Explain about natural pigments There has been an extensive search of the microbial, plant and animal kingdoms for pigments that possess both high tinctorial power/strength (a m
The technical term used for the androecium in a flower of China rose (Hibiscus rosasinensis) is: 1. Monadelphous 2. Diadelphous 3. Polyandrous 4. Polyadelphous
Explain about the Deficiency of Riboflavin? Riboflavin deficiency results in the condition of hypo- or ariboflavinosis, with sore throat, hyperaemia (condition in which the bl
Normal 0 false false false EN-IN X-NONE X-NONE
WHAT IS THE CLASSIFICATION OF PROTOZOA ..
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