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 the phenomenon known as "red tide"? Which ambiental harms can it cause? Red tide is a phenomenon that happens when dinoflagellates (algae from the pyrrophyte group) pro
What are the advantages of the closed circulatory system over the open circulatory system? The closed circulatory system is more efficient. As blood circulates only inside bloo
What are the noteworthy features of the nervous system of arthropods? In arthropods the nervous system has more complicated sensory receptors with well-advanced cephalization.
what is salen and its characterstics
Define Precipitation or Solubility of Proteins? Most of the functional properties are dependent on the degree to which the proteins are soluble. The solubility behaviour provid
Which of the following does not (or did) not lay an amniotic egg? A) Birds B) Monotreme Mammals C) Dinosaurs D) Frogs E) Snakes
DIFFERENCE S BETWEEN MAN & RABBIT - S.NO . 1. M A N Brain round RABBIT Elongated 2. Olfa
what is tissue
Estimation of Depth of Burn Injury: A thermal injury is described as partial thickness or full thickness, depending on the depth and severity of tissue damage a) First D
K.L. is a 30-year-old Caucasian male was brought to Emergency Department (ED) after a bicycle accident. He was hit from behind by a compact car traveling at 35 miles per hour. On
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