Define absorption, transport and excretion - calcium, Biology

Assignment Help:

Define Absorption, Transport and Excretion - Calcium?

Calcium (Ca) in food occurs as calcium salts e.g. calcium phosphate or is associated with other dietary constituents e.g. calcium caseinate in milk. Before absorption, Ca must be released from foods and solubilized. This is achieved by the combined actions of gastric acid, intestinal enzymes, intestinal contractions and peristalsis. When calcium intake is low, calcium is mainly absorbed by active (transcellular) transport, but at higher intakes, an increasing proportion of calcium is absorbed by simple (paracellular) diffusion. Thus, calcium is absorbed from the intestine by transcellular route and paracellular route.


Related Discussions:- Define absorption, transport and excretion - calcium

Problems of osmoregulation, Problems of Osmoregulation The water, some...

Problems of Osmoregulation The water, some inorganic salts, nutrient molecules are some of the important components of the body fluids. It is essential for the animals to main

Define reaction of fehling solution with lactose, Define Reaction of Fehlin...

Define Reaction of Fehling solution with lactose? After complete reduction of cupric ions, the indicator is reduced by lactose to a leuco compound, restoring the red colour of

Do sea urchins have teeth, Do sea urchins have teeth? Sea urchins have ...

Do sea urchins have teeth? Sea urchins have a teeth-like structure juxtaposed to the mouth and made of five teeth linked to ossicles and muscle fibers. This structure, called a

Clinical trials for changing nutrient requirements with age, Define Clinica...

Define Clinical Trials for Changing nutrient requirements with age? Several clinical trials provide evidence of changing nutrient requirements with age. The metabolic demand fo

#title, Feeding mechanism in holozoic organisms

Feeding mechanism in holozoic organisms

What is stenotic and regurgitant lesions, Q. What is Stenotic and regurgita...

Q. What is Stenotic and regurgitant lesions? The normal cardiac valves offer little resistance to blood flow even when flow velocity is high. When stenosis develops, the valve

Difference between aqueous humour and vitreous humour, Difference between a...

Difference between aqueous humour and vitreous humour - Aquou s Humour Vitrou s humour 1. Occurs in aquous chamber   2. Wat

What are the uses of whey protein concentrates, What are the uses of whey p...

What are the uses of whey protein concentrates? Whey protein concentrates are used extensively in the manufacture of baked goods, where they increase the effectiveness of short

The accident or incident theory - accident causation, The Accident or Incid...

The Accident or Incident Theory - Accident Causation Peterson when reiterating the significance of human factors added such factors as ergonomic traps, the decision to err and

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd