新视野大学英语读写教程第三册Unit 2 SectionA教案

Unit 2 Section A Iron and the Effects of Exercise

Part One: Objectives

1. To learn more about iron and the benefits brought by exercise;

2. To develop related vocabulary;

3. To write an article in the cause-and-effect pattern;

4. To write a notice.

Part Two: Warming up

1. Label Reading

It's good for your health to check the food label before you buy. But do you know how to read a nutrition facts label?

Do you know all the nutrients on the label?

Which nutrients should be limited?

Which nutrients should be ensured?

Calories 卡路里 Saturated Fat 饱和脂肪 Trans Fat 反式脂肪 Calcium 钙

Cholesterol 胆固醇 Sodium 钠 Carbohydrate 碳水化合物 Iron 铁

Dietary Fiber 食纤维质 Sugar 糖 Protein 蛋白质 Vitamin 维生素

Zinc (锌) Copper (铜)

2. Minerals help the body grow.

CALCIUM is a mineral found in milk and cheese and helps to build strong bones and teeth.

ZINC is a mineral that helps cells reproduce, preserve vision and boost immunity.

IRON is another mineral that is important for healthy blood. Liver and green veggies are good sources of iron.

COPPER is the mineral involved in the absorption, storage and metabolism of iron. It is found in the blood bound to proteins.

Can you help Sue to find out what is the missing nutrient?

Sue is a 13-year-old who doesn t eat grains or meat. She often feels tired or sluggish. Her doctor says her red blood cell count is too low.

The missing nutrient is IRON. Iron is very important. Without it, you get anemia, a lack of red blood cells. Women need more iron than men because they lose blood during menstruation. You can get iron from foods in the grain and meat groups.

3. What are the positive effects of exercise?

1) It stimulates the flow of our blood;

2) It builds up the speed with which our brains react to things around;

3) It improves our health conditions;

4) It helps foster our ambition for greater success or better balance of mind;

…

1) Proper exercise can stimulate the flow of our blood, thus bettering our whole health conditions.

2) Regular exercise can greatly improve the speed with which our brains react to what is going on

around us.

3) Good and progressive exercise can help foster our ambition for greater success or better balance

of mind.

4. What’s the relationship between exercise and iron?

1) The more physical exercise we take, the more iron there will be in our blood;

2) The more physical exercise we have, the less iron there will be in our blood;

3) The amount of exercise has little bearing on the reserves of iron in our blood;

…

Sad to say, the link between exercise and iron is that, the more physical exercise we take, the more chances we stand to suffer the loss of iron in the blood. If you find no way to feel refreshed through regular exercise, for example, you may be a victim of iron loss. And, if you are still in the dark about its gravity and go on with more intense exercise, you will invite a greater trouble.

5. How does iron leak out of our blood?

1) It leaks through our sweat?

2) It leaks through our digestive system?

And its victims include: 1) Those engaged in intense exercise?

2) The women of childbearing age?

…

According to medical research, during our exercise, some iron disappears through sweat; and

some other iron leaks as a result of the bleeding of our digestive system if our exercise is of intense kind. Besides, continual high-impact exercise may result in bleeding through small blood vessels in the feet. And iron may leak through some unknown mechanisms.

Thus, iron loss or iron deficiency is more likely to happen among the people as follows: those who take part in intense endurance exercise; those whose digestive system is apt to bleed; and those who already live with the problem of poor iron status, like the women of childbearing age who have a monthly bleeding, and those who are going on a fat-reducing diet.

6. How to remedy or prevent iron deficiency?

1) Take iron-fortified foods, such as …?

2) Enjoy diverse meat dishes on a regular basis, including …?

3) Eat Vitamin C-rich vegetables, like …?

4) Take iron supplements?

5) Drink tea or coffee over meals?

…

To reverse or prevent iron deficiency,

1) Eat iron-fortified foods a lot, such as breakfast cereals;

2) Enjoy diverse meat dishes on a regular basis, including dishes of red meat, fish, and poultry;

3) Eat Vitamin C-rich vegetables and fruits, like tomatoes, oranges, peppers, and dates;

4) Don t take iron supplements, for they have side effects;

5) Never drink tea or coffee at the meal time because substances in tea and coffee will interfere with iron being absorbed into the body.

7. Do you often go in for physical exercise and what’s your art of exercising?

Yes, I do. There is nothing new in my way of exercising, but there are two practices I always cling to: 1) I never try to follow the fashion. No matter whether the hula loop or the social dancing is in, my interest in the same exercise remains what it has been. 2) The forms of my exercise change with my age. When I was in teens and twenties, I was fond of playing balls; when I was middle-aged, I turned my interest to table-tennis; and now I am getting on in years, so I become addicted to tai chi, an exercise suitable to the senior.

8. What principles should new exercisers pay attention to?

Here are the insights gleaned from my own experience in physical exercise: 1) Before you take any physical exercise, you must have a clear idea about what kind of exercise is good for your health as well as suit …… 此处隐藏：25353字，全部文档内容请下载后查看。喜欢就下载吧 ……