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Carbohydrates

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by

Gisele Loya

on 2 October 2014

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Transcript of Carbohydrates

C
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Carbs are one of the
main dietary components
Classifications:
The clasification depends
on the chemical structure
of the food, and how quickly
the sugar is digested and absorbed.
Fructose
reacts with glucose to form sucrose
found in carbonated beverages, honey, and fruit juices
This includes:
Sugars
Starches
Fibers
Roles of
Carbohydrates
provide energy for moving muscles
provide fuel for central nervous system
enable fat metabolism
prevent protein from being used as energy
Food Groups Containing Carbohydrates
grains
fruits
dairy
some vegetables
what is a
carbohydrate?
An organic compound containg carbon, nitrogen, hydrogen, and oxygen in a ratio of one oxygen and two hydrogen atoms for each carbon atom.
Carbohydrate
Content of:
Total Carbohydrates: 26.7 grams
Dietary Fiber: 1.4 grams
Sugars: 3.4 grams
Cellulose is made from glucose. It cannot be broken down for food in humans. Cellulose is needed for fiber.
Simple
have one (single) or two (double) sugars

Examples of single sugars: fructose and galactose

Examples of double sugars: lactose, maltose, and sucrose
Fun Fact: Honey is a double sugar, but isn't like table sugar and should not be given to children under the age of one.
Glucose
combines to form starch and cellulose (dissacharide: maltose)
found in oranges, tangerines, and fruit toaster pastries
Galactose
reacts with glucose to form lactose
found in celery, honey, and fruit baby food
Ribose
forms part of nucleotide of RNA
found in chicken and dairy products
also a nucleic acid
DEoxyribose
forms part of nucleotide of DNA

also a nucleic acid
AFTER a

is eaten
broken down in stomach and small intestine by amylase into smaller units of sugar
absorbed by small intestine and enter bloodstream, travel to liver
all sugars are converted to glucose by liver
transported through bloodstream to tissues and organs to be used as energy
side effects
of carbs:
Getting too many carbs: vs. Not getting enough carbs:
can lead to increase in total calories, causing obesity
can cause lack of calories (malnutrition) or excessive intake of fats to make up the calories
Recommendations: Most people should get between 40% and 60% of total calories from carbs.
carbohydrate
Papa John's Original Crust
Cheese Pizza
cont.
carbohydrates
Different Molecules of Carbohydrates
Glucose
Galactose
Fructose
Ribose
Deoxyribose
Gisele Loya
Iesha Young
Anna Meinzen
Mackenzie Freeman
Simple and Complex
sources
http://www.infoplease.com/cig/biology/carbohydrates.html
http://www.extension.iastate.edu/humansciences/content/carbohydrate
http://biology.stackexchange.com/questions/10789/the-real-definition-of-carbohydrates
http://www.biology-online.org/dictionary/carbohydrate
Full transcript