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DHN exam exam with correct answers 2024
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  • DHN Exa

Why are fats important in cooking? correct answers flavor, texture, appearance, mouthfeel, emulsifier Why are fats important in the body? correct answers energy source, insulation, cushion, part of the cell membrane, can be made into other substances (bile) Are lipids organic? correct answ...

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  • August 24, 2024
  • 9
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • DHN exa
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DHN exam 2 study guide
Why are fats important in cooking? correct answers flavor, texture, appearance,
mouthfeel, emulsifier

Why are fats important in the body? correct answers energy source, insulation,
cushion, part of the cell membrane, can be made into other substances (bile)

Are lipids organic? correct answers yes

What are the three general categories of lipids? correct answers Triglycerides,
phospholipids, and sterols

Describe the parts of a triglyceride. correct answers glycerol + 3 fatty acids

Structures, sources, and health benefits of SATURATED fatty acids? correct answers -
no double bonds
- often SOLID at room temperature
- INCREASES risk of heart disease - needs limitations
- cheese, whipped cream, Alfredo sauce

Structures, sources, and health benefits of MONOUNSATURATED fatty acids?
(MUFAs) correct answers - 1 double bond
- often LIQUID at room temperature
- may REDUCE risk for heart disease
- olive oil, safflower oil, canola oil

Structures, sources, and health benefits of POLYUNSATURATED fatty acids? (PUFAs)
correct answers - 2 or more double bonds
- often LIQUID at room temperatures
- some types healthier than others (omega-3 FA)

Fatty acid composition of canola oil? correct answers MUFA= 64%
PUFA= 28%
SATURATED= 8%

Fatty acid composition of olive oil? correct answers MUFA= 75%
PUFA= 11%
SATURATED= 14%

Fatty acid composition of butter fat? correct answers MUFA= 28%
PUFA= 4%
SATURATED= 68%

, Fatty acid composition of coconut oil? correct answers MUFA= 6%
PUFA= 2%
SATURATED= 92%

KNOW HOW TO DRAW THE STRUCTURE OF 18-CARBON SATURATED FATTY
ACID correct answers

What are the health benefits of consuming omega-3 fatty acids? correct answers -
They reduce the risk for- heart disease, depression, dental disease, arthritis, and others
- They improve- immune function, brain development in infants

What are some food sources of omega- 3 fatty acids? correct answers fish, canola oil,
soybeans, flaxseeds, walnuts, wheat germ, breast milk (if the woman eats a lot of
omega 3's)

What advice do you have about including fish in the diet? correct answers - aim for 2-3
servings a week
- include a variety
- there is no benefit in choosing farmed vs wild fish (both are good)

What is a potential concern with excessive fish intake? correct answers Mercury toxicity
(mercury accumulates in fatty tissue of fish, especially toxic to brain, leading to
headaches and extreme fatigue)

How is a trans-fat different than a saturated fat? correct answers they are bonded in a
"trans" configuration, either CIS or TRANS form

How are most trans-fats made? correct answers Most result from a hydrogenation
process

How do trans-fats effect health? correct answers BAD for health

How is the structure of a phospholipid different than that of a triglyceride? correct
answers structures similar to triglycerides except for one of the fatty acid chains is
replaced by a group containing phosphorus

What are key functions of phospholipids? correct answers - part of cell membranes
- emulsifiers (helps water and oil mix)= salad dressing, mayonnaise

What are examples of sterols? correct answers vitamin D, bile, some hormones,
cholesterol

Why is cholesterol important to the body? correct answers it's important in structure of
brain and nerve cells

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