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Week 7 Sci228

By | June 2012
Page 1 of 2
Week 7 Assignment
Humans experience a life cycle similar to other mammals, starting with an embryo and ending at death. A life cycle begins at conception. The average life of a human is about 67 years. Adulthood is usually the longest lasting stage in the human life cycle, stretching from age 20 to 50. By age 35, adults are considered "middle age" until they become a mature adult. Vitamins and minerals are an important part of nutrition. Vitamins are organic substances present in food. They are required by the body in small amounts to regulate metabolism and to maintain normal growth and functioning. Minerals are vital because they are the building blocks that make up the muscles, tissues, and bones. They also are important to many life-supporting systems, such as hormones, transport of oxygen, and enzyme systems. Oat bran, which is a whole grain, can supply fiber and a mineral called magnesium. Good nutrition can help prevent weight gain by focusing on consuming calories that are high in nutrients, not in sugars and fat. Nutrition also plays a role in preventing and controlling diseases. Poor nutrition can lead to high cholesterol, which causes coronary heart disease. Lowering salt in the diet can control high blood pressure. People with diabetes must follow special diets to control their blood glucose levels.

Grains. The guidelines recommend eating at least three ounces of whole grain bread, cereal, crackers, rice, or pasta every day. At least one-half of all grains should be whole grains, which can be determined by looking for the word “whole” before the grain name on the list of ingredients. Vegetables. The pyramid recommends eating more dark green and orange vegetables, as well as more dry beans and peas. Fruits. A variety of fresh, frozen, or canned fruit is good, but the USDA recommends taking it easy on fruit juices. Milk, yogurt, and cheeses. The USDA recommends getting plenty of calcium-rich food from low-fat or fat-free milk. People who can’t...

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