Define steps in the development of exchange list, Biology

Assignment Help:

Define Steps in the Development of Exchange List?

As mentioned above, when we group together similar food items so that each supplies a constant amount of a particular nutrient, we call the group a food exchange. Given herewith are the steps which when followed, will guide you in developing the exchange list. You will realize that developing an exchange list for Indian foods is a difficult task as our dishes defy any attempt at standardization.

1) An important first step in developing an exchange list is the standardization of serving or portion sizes. The portion sizes vary considerably in India. ldlis, dosas, chapattis and puris of different sizes in different states and in different households is a common scene. Despite this, some attempts have been made to define portion sizes.

2) The second step is to calculate the energy, carbohydrate, protein and fat content of one serving or portion size of the different dishes. This can be done by converting the cooked weight of one serving of a dish into raw weight of the T ingredients that have gone into it. Although allowances should be made for cooking losses, this has not been done. Future exchange lists must take care of this. From the raw weights of the ingredients in one serving and using the Indian Food Composition tables, the energy, carbohydrate, protein and fat content of one serving can be calculated.

3) The third step is to create an exchange list of different dishes in terms of standard portion sizes that would provide approximately the same energy or carbohydrate or fat as the case may be. Since foods contain widely varying amount of the macronutrients, serving or portion sizes are defined for a group of more or less homogeneous foods. For example, all cereals provide approximately the same number of calories, approximately 350 per 100 g raw weight and about the same amount of carbohydrates, about 70 g per 100 g raw m weight. Therefore, cereal exchanges are grouped together. Similarly, there are vegetable, fruits, milk and meat exchanges. Within each of these food groups, the composition of the different items in terms of carbohydrate, protein and fats remain similar.


Related Discussions:- Define steps in the development of exchange list

Digestion, In humans, starch digestion begins in the buccal cavity, but sto...

In humans, starch digestion begins in the buccal cavity, but stops in the stomach .Why?

Zone of polarizing activity (zpa), Zone of Polarizing Activity (ZPA) T...

Zone of Polarizing Activity (ZPA) The A-P axis is the 1 st axis to be fixed in the presumptive limb mesoderm at a very early stage. On the basis of results of a series of cur

Homeostasis, HOMEOS T ASI S - Homeo = same,   Stasis = state Li...

HOMEOS T ASI S - Homeo = same,   Stasis = state Living beings maintain their internal environment by self regulating system, it is called homeostasis. Term coined by

Haemocyanin - respiratory pigments, Haemocyanin - Respiratory Pigments ...

Haemocyanin - Respiratory Pigments This pigment is found in several arthropods and molluscs. Haemocyanins do not consist of haee groups. The metal they consist of is copper, w

Target organ damage and complications, High blood pressure makes your heart...

High blood pressure makes your heart work harder and, over time, can damage blood vessels throughout your body. If the blood vessels in your kidneys are damaged, they may stop remo

Which part of the skin is the pigment injected, Permanent tattoos are made ...

Permanent tattoos are made by injecting pigment into the skin. Into which part of the skin is the pigment injected, the epidermis or dermis?

Explain the meaning of anthropometric measures, Explain the Meaning of anth...

Explain the Meaning of anthropometric measures Anthropometric Measures mean and its uses. The term Anthropometric refers comparative measurement relating to the body structure.

Digestion of carbohydrates, Digestion of carbohydrates Carbohydrate di...

Digestion of carbohydrates Carbohydrate digestion in vertebrates and invertebrates is very similar. All the enzymes shown in Table are not required by all animals. The enzymes

Why is maternal milk important for baby, Q. Why is maternal milk important ...

Q. Why is maternal milk important for the immune protection of the baby? Besides being nutritionally important like maternal milk participates in the defense of the baby agains

Systemic emboli, Osler's nodes are small, tender subcutaneous nodules that ...

Osler's nodes are small, tender subcutaneous nodules that develop in the pulp of the digits or occasionally more proximally in the fingers and persist for hours to several days. Th

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