1. Know the three classes of fat.
Which is the most common type?
What is the best known example of a sterol?
phospholipids, sterols, triglyicerides
2. What are the functions (usefulness) of fat in the body and in food?
- fat is the bodys chief storage form for the energy from food eatin in excess of need.
- 1. When low on fuel, the body draws on its stored fat for energy.
- C. Usefulness of Fats in Food – Table 5-1 Energy storesMuscle fuel, Emergency reservw, Padding,Insulation Cell membranes,Raw materies for hormones bile and vitamin d as needed, nutrient, Energy,Transport raw materials for fats,Sensory appeal,Appetite,Satiety texture
3. What food groups are the major sources of dietary fat in the US diet?
Fats of meat, milk, and added fats are the main contributer of saturated fat to the us diet
What percentage of the dietary calories should come from fat?
20 to 35 percent
5. What is cholesterol? Why do we need cholesterol in order for our body to function properly?
Consumed from foods of animal origin, including meat, fish, poultry, eggs, and dairy products. Plant foods, such as grains, fruits and vegetables, and oils from these sources contain no dietary cholesterol.
- Cholesterol serves as the raw material for
- 1. Bile
- 2. Vitamin D
- 3. Steroid hormones including the sex hormones
Free cholesterol is a component of cell membranes and serves as a precursor for steroid hormones, including estrogen, testosterone, aldosterone, and bile acids. Humans are able to synthesize sufficient cholesterol to meet biologic requirements,
? What is the recommended limit on dietary cholesterol intake according to the 2005 Dietary Guidelines for Americans?
less than 300 mg/day of cholesterol
6. Have a general understanding of serum cholesterol, triglycerides, HDL and LDL,
the factors that impact these blood values,
and generally speaking should they be higher or lower values. What is the function of HDL? Of LDL?
lipoproteins that transport triglycerides and other lipids FROM the liver to the various tissues in the body
want it high or low?
LIVER TO TISSUE
transport cholesterol and other lipids to the tissues. LDL are made from VLDL after they have donated many of their triglycerides to body cells.
bad want it to be low
want it high or low?
critical in the process of caring cholesterol away from the body cells to the liver for disposal
good, want it to be high
FROM THE TISSUE TO THE LIVER FOR DISPOSAL