Pre-Class Questions Chapter 5: Lipids

Front

What type of fatty acid contains no double bonds and is solid at room temperature?

Back

Saturated fatty acids are solid at room temperature and contain no double bonds.

Front

What is the difference between essential and nonessential fatty acids?

Back

Essential fatty acids (e.g., omega-3, omega-6) must be consumed in the diet; nonessential fatty acids can be synthesized by the body.

Front

What is the desirable total cholesterol level (mg/dL) recommended by the NIH?

Back

Less than 200 mg/dL is considered a desirable total cholesterol level.

Front

List two dietary or lifestyle changes that can reduce the risk of cardiovascular disease related to fat intake.

Back

Limit saturated fat intake and increase unsaturated fats (e.g., omega-3). Exercise regularly and increase fiber intake.

Front

Why does fat provide more energy per gram than carbohydrates or protein?

Back

Fat provides 9 kcal/g because it contains more carbon-hydrogen bonds, compared to 4 kcal/g in carbs and protein.

Front

What are omega-3 fatty acids?

Back

Omega-3 fatty acids are essential fats that the body cannot produce, found in fish, flaxseeds, and walnuts.

Front

What is the role of unsaturated fats in the diet?

Back

Unsaturated fats can help reduce bad cholesterol levels and are beneficial for heart health.

Front

What are trans fats and why are they harmful?

Back

Trans fats are artificially created fats that can increase bad cholesterol levels and lower good cholesterol, raising the risk of heart disease.

Front

What is the function of lipids in the body?

Back

Lipids serve as a source of energy, insulation, and protection for organs, and are essential for cell membrane structure.

Front

How do dietary fats affect cholesterol levels?

Back

Saturated fats can raise LDL (bad cholesterol) levels, while unsaturated fats can help lower them.