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!
Define about the Paracellular Route - Calcium?
It involves passive Ca transport through the tight junctions between mucosal cells. The salient features include:
Thus, we can say that most Ca absorption takes place in the small intestine. There is some evidence, which suggests that not more than 4% (8 mg) of dietary Ca is absorbed by the colon per day. The unabsorbed component which appears in the faeces together with the unabsorbed component of digestive juice calcium is known as endogenous faecal calcium. The faeces, therefore, contain unabsorbed dietary calcium and digestive juice calcium that was not reabsorbed. True absorbed calcium is the total amount of calcium absorbed from the calcium pool in the intestines and therefore contains both dietary and digestive juice components.
Net absorbed calcium is the difference between dietary calcium and, faecal calcium and is numerically the same as true absorbed calcium minus endogenous faecal calcium. At zero calcium intake, all the faecal calcium is endogenous and represents the digestive juice calcium which has not been reabsorbed; net absorbed calcium at this intake is therefore negative to the extent of about 200 mg (5 mmol). When the intake reaches about 200mg (5 mmol), dietary and faecal calcium becomes equal and net absorbed calcium is zero. As calcium intake increases, net absorbed calcium also increases, steeply at first but then, as the active transport becomes saturated, more slowly until the slope of absorbed or ingested calcium approaches linearity with an ultimate gradient of about 5 -10%. True absorption is an inverse function of calcium intake, falling from some 70 % at very low intakes to about 35% at high intakes. There are several factors which influence the amount of calcium absorbed through the intestine. These factors can thus be related to the bioavailability of calcium. The subsequent discussion will look at these factors in detail. But first we shall look at the excretion of unabsorbed calcium.
What is a pigment? Scientifically, a chemical that can impart colour and is insoluble in the solvent in which it is used, is referred to as a 'pigment'. Well, you would agree
function of topoisomerace?
Define the Phosphorus - The Macromineral? The body contains about 620 g (20 moles) of phosphorus. Of this 87% is present in bones. It is thus more widely distributed in the bod
Mr. Jones I.V. was hung at noon. It is a liter bag and is infusing at 65 ml/hr. How many hours will this bag last?
Define the Clinical Manifestations of Underweight? Underweight may predispose to fatigue, lethargy and breathlessness. Iron-deficiency anaemia is usually seen because the diet
Question 1 Give an account of t-RNA 2 Write short note on Competitive inhibition 3 What are ketone bodies? Write the mechanism of ketogenesis 4 Describe the properties of nucle
Phylum Ciliophora 1) They have cilia at some stage in the life-cycle. The cilia are used for locomotion or creating a feeding current. 2) They feed heterotrophically usually
Define about skeletal muscle? A. The binding of calcium ion to a binding site on the troponin molecule leads to a movement of the tropomyosin molecule that, in turn, exposes a
Nature of Metabolites in Sieve Tubes The phloem sap contains three major classes of organic compounds - organic acids, amino acids and sucrose besides some cations, anions and
Classic Procedure: The approach is the same as described earlier for open mitral valvotomy. The excision starts with an anterior incision on the anterior leaflet at 12o'clock p
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