Podcast
Questions and Answers
What is the general characteristic of lipids in terms of solubility?
What is the general characteristic of lipids in terms of solubility?
- They are neither soluble in water nor organic solvents.
- They are soluble in water but insoluble in organic solvents.
- They are insoluble in water but soluble in organic solvents. (correct)
- They are both soluble in water and organic solvents.
What happens when you mix oil and vinegar in a salad dressing?
What happens when you mix oil and vinegar in a salad dressing?
- The oil dissolves completely in the vinegar.
- The oil and vinegar react to form a new compound.
- The oil becomes denser than the vinegar and sinks to the bottom.
- The oil and vinegar mix together but separate when left undisturbed. (correct)
What is the primary source of energy from lipids?
What is the primary source of energy from lipids?
- Protein
- Carbohydrates
- Phospholipids
- Triglycerides (correct)
What is a common health concern associated with lipids?
What is a common health concern associated with lipids?
What is the percentage of water in vinegar?
What is the percentage of water in vinegar?
What is the result of shaking a mixture of oil and vinegar?
What is the result of shaking a mixture of oil and vinegar?
What is the term for the major kind of lipid that includes fatty acids and triglycerides?
What is the term for the major kind of lipid that includes fatty acids and triglycerides?
What is the common phrase associated with the mixing of oil and water?
What is the common phrase associated with the mixing of oil and water?
What is the primary function of subcutaneous fat?
What is the primary function of subcutaneous fat?
What is the role of dietary lipids in food?
What is the role of dietary lipids in food?
Why is it impossible for a person to be 'fat free'?
Why is it impossible for a person to be 'fat free'?
What is the benefit of having excess body fat for older adults like Rose?
What is the benefit of having excess body fat for older adults like Rose?
What would happen to the sensory quality of the baked cake if you replace the water with whole milk?
What would happen to the sensory quality of the baked cake if you replace the water with whole milk?
What is the primary function of fat in the body?
What is the primary function of fat in the body?
Why are many Americans confused about the roles of fat and cholesterol in health?
Why are many Americans confused about the roles of fat and cholesterol in health?
What is the role of lipids in the plasma membrane?
What is the role of lipids in the plasma membrane?
Study Notes
Introducing Lipids
- Lipids are a class of macronutrients that includes fatty acids, triglycerides, phospholipids, and cholesterol.
- Lipids are insoluble in water but soluble in organic solvents like alcohol and acetone.
Properties of Lipids
- When mixed with water, lipids do not dissolve to form a solution due to their insolubility.
- Lipids are less dense than water, causing them to rise to the top of water when mixed.
Functions of Lipids
- Provide and store energy
- Maintain cell membranes
- Produce certain hormones
- Insulate the body against cold temperatures
- Cushion the body against bumps and blows
- Contribute to body contours
- Absorb and store fat-soluble vitamins and phytochemicals
Importance of Lipids in Foods
- Enhance intestinal absorption of fat-soluble vitamins and phytochemicals
- Contribute to the rich flavor, smooth texture, and appetizing aroma of foods
- Make foods taste more appetizing
Confusion about Fat and Cholesterol
- Consuming high amounts of certain lipids may increase the risk of cardiovascular disease (CVD)
- Some dietary fat is essential to good health
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Description
Test your knowledge of lipids, including their properties, functions, and characteristics. Learn about macronutrients, insolubility, and more!
