Question

1. looking at figure 4.1.2, notice that there are many health benefits of dietary fiber. why do you think most people do not get enough fiber?

answer:
proteins

1. compare complete and incomplete proteins. how are they similar? in what ways are they different?

answer:
fats

1. explain the differences among saturated, unsaturated, and trans fats.

answer:

1. is one type of fat healthier for you than another? explain.

answer:
vitamins

1. compare water - soluble and fat - soluble vitamins and give an example of each.

answer:

1. why is it better to get the vitamins you need from your food choices rather than a vitamin supplement?

answer:

Explanation:

1. Dietary Fiber: Most people may not get enough fiber due to a diet high in processed foods which often lack fiber, and a preference for refined grains over whole - grains.
2. Proteins: Similarity: Both complete and incomplete proteins are made up of amino acids. Difference: Complete proteins contain all the essential amino acids that the body cannot produce on its own, while incomplete proteins lack one or more essential amino acids.
3. Fats - 1: Saturated fats have single bonds between carbon atoms and are usually solid at room temperature (e.g., butter). Unsaturated fats have one or more double bonds and are usually liquid at room temperature (e.g., olive oil). Trans fats are unsaturated fats with a trans - configuration and are often the result of hydrogenation of unsaturated fats.
4. Fats - 2: Unsaturated fats, especially monounsaturated and polyunsaturated fats, are generally healthier as they can help lower cholesterol levels and reduce the risk of heart disease compared to saturated and trans fats which are linked to increased health risks.
5. Vitamins - 1: Water - soluble vitamins dissolve in water and are not stored in the body for long (e.g., vitamin C). Fat - soluble vitamins dissolve in fat and can be stored in the body's fatty tissues (e.g., vitamin A).
6. Vitamins - 2: Food contains other nutrients and phytochemicals that work synergistically with vitamins for better absorption and overall health. Also, it is less likely to have vitamin over - dosage from food compared to supplements.

Answer:

1. Most people may not get enough fiber due to a diet high in processed foods and preference for refined grains.
2. Similarity: Both are made of amino acids. Difference: Complete proteins have all essential amino acids; incomplete lack some.
3. Saturated fats have single bonds, usually solid; unsaturated have double bonds, usually liquid; trans fats are unsaturated with trans - configuration.
4. Unsaturated fats are generally healthier as they can reduce heart - disease risk compared to saturated and trans fats.
5. Water - soluble dissolve in water (e.g., vitamin C); fat - soluble dissolve in fat (e.g., vitamin A).
6. Food has other nutrients and phytochemicals for better absorption and less risk of over - dosage.