Chapter 4 - Chapter Four Carbohydrates: Sugars, Starches,...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter Four Carbohydrates: Sugars, Starches, and Fiber HPEB 502 Spring 2011
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
What Are Carbohydrates and Why Do You Need Them? Found primarily in plant-based foods Most desirable form of energy for body In form of glucose (-ose = carbohydrate) _Red Blood Cells__  and  our Brain      especially rely  on glucose for fuel source. Which means?
Background image of page 2
Plants convert the sun’s energy into glucose by  photosynthesis. Glucose is most abundant carbohydrate in nature. Used as energy by plants or combined with minerals from  soil to make other compounds, such as protein and  vitamins Glucose units linked together and stored in form of starch Figure 4.1 in our text
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
What Are Simple Carbohydrates? Simple carbohydrates are  monosaccharides  and  disaccharides Three monosaccharides one-unit sugars Disaccharides : two monosaccharides joined together Maltose  = glucose + glucose Sucrose  (table sugar) = glucose + fructose Lactose  (milk sugar) = glucose + galactose
Background image of page 4
What are Complex Carbohydrates? Complex carbohydrates:  polysaccharides Long chains and branches of sugars linked together Figure 4.2 in text Examples: 1. Starches 2. Glycogen 3. Fiber  
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Starches Starch     is the storage form in plants. Amylose: straight chains of glucose units Amylopectin: branched chains of glucose units Sources of starch in the foods we eat: 1. potatoes 2. pasta 3. rice 4. bread 5. etc.
Background image of page 6
Fiber is Non-digestible but Important Fiber is part of plant that we eat but cannot digest Examples:  1. Pectin 2. Cellulose 3. Hemacellulose 4.Lignins 5. Gums Humans lack __enzymes __ needed to break down fiber. Dietary fiber:  naturally found in foods Functional fiber:  added to food for beneficial effect Example: ____psyllium__  added to cereals Total fiber     + 
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Soluble and Insoluble Fiber Fiber is classified by its affinity for water. Soluble fiber:  dissolves in water and is fermented by  intestinal bacteria Some are  viscous , have thickening properties Move more slowly through GI tract Lower  blood cholesterol  and  risk of heart disease Insoluble fiber:  cellulose, hemicellulose, lignins Move more rapidly through GI tract, laxative effect Examples: Bran Cereal fiber Seeds Fruits and Vegetables
Background image of page 8
More on Fiber Fiber is resistant to digestion but has many  powerful health effects. Fiber helps lower risk of developing: See Table 4.5 in text
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Filling Up on Fiber DRI: _14 __ grams of fiber per 1,000 calories to  promote heart health Typical American intake is: Much lower than recommended Men should get 38g Fiber Women should get 25g Fiber Men usually don’t get enough fiber
Background image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/05/2012 for the course HPEB 502 taught by Professor Montgomery during the Spring '09 term at South Carolina.

Page1 / 50

Chapter 4 - Chapter Four Carbohydrates: Sugars, Starches,...

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online