"Nutrition Substances in Food" Human Nutrition PPT Courseware 2

Description

"Nutrition Substances in Food" Human Nutrition PPT Courseware 2

teaching objectives:

1. Name the main nutrients needed by the human body.

2. Use scientific inquiry methods to measure the energy in food.

3. Agree that human nutrients mainly come from other organisms in the biosphere.

Data analysis (combined with P41. Table)

1. Different foods contain different types and amounts of nutrients.

2. Nutrients in food are the source of substances contained in human cells.

Six major nutrients:

carbohydrates, fats, proteins,

water, inorganic salts, vitamins

Long-term protein deficiency will lead to protein deficiency. Patients lose weight, reduce resistance, slow wound repair, edema and anemia, and infant growth retardation.

Explore:

1. If different, the reasons may be: the experimental operation is not standardized enough, the measurement is not accurate enough, or there is an error in the calculation, etc.

2. The research experiment is only done once, and errors may occur, so the results are unreliable. It should be repeated three times with all conditions being the same, and the average of these three times should be taken to minimize the impact of errors.

Some suggestions:

The best drink is boiled water, because many drinks contain preservatives, flavors or artificial colors, and contain a lot of sugar. Regular drinking is not good for your health;

Fruits and vegetables eaten raw should be washed to avoid pesticide poisoning.

Try to eat less leftovers and leftovers that have been left over for a long time. If eaten, be sure to heat it thoroughly to prevent bacterial food poisoning;

Do not eat food sold on the street without a health permit;

Try to eat less fried, smoked and barbecued foods.

Developing good hygiene habits, cutting nails frequently and washing hands before meals and after using the toilet can prevent the spread of infectious diseases.

1. Feedback in class

1. Food contains ____, ____, ____, ____, ____ and ____.

2. Human growth and development, as well as the repair and renewal of damaged cells, are inseparable from ____.

3. ________ is not the main raw material of the human body, nor can it provide energy for the human body. However, once the human body lacks it, it will affect normal growth and development, and even cause illness.

4. A certain classmate doesn’t like to eat vegetables, and his gums often bleed when brushing his teeth recently. He may be lacking ____ in his body.

5. There are ____ types of vitamins, and people’s daily demand for them is also ____, but their effects on the human body are important. Once the human body lacks vitamins, it will affect normal function.

6. ____, ____, and ____ are the main organic compounds that make up cells and can provide energy for life activities.

2. A discerning eye:

1. The following foods contain vitamin C. The most common ones are ( )

A.Spinach B.Tomato C.Fish D.Chili

2. If a person suffers from night blindness, what food do you think he needs is ( )

A.Chicken liver B.Chili C.Fish D.Milk

3. What inorganic salt do you think anemic people may lack in their bodies? ( )

A.Magnesium B.Zinc C.Iron D.Calcium

4. Children’s regular consumption of cod liver oil and pork liver can prevent ( )

A. Night blindness and beriberi B. Cheilitis and rickets

C. Rickets and night blindness D. Angular stomatitis and night blindness

5. Which of the following substances does not belong to sugar ( )

A. Glucose B. Starch C. Xylitol D. Maltose

6. The foods patients with athlete’s foot should eat more are ( )

A. Refined white flour B. Carrot C. Refined white rice D. Standard flour

7. Which statement about water in food is incorrect ( )

A. It has the function of transporting nutrients. B. It is a source of energy.

C. Is one of the sources of water in human cells D. Can transport waste

In 1913, the Russian ship "Holy Hook" carried members of the Arctic expedition to overwinter among the ice in the Arctic Ocean. It didn't take long before the team members fell ill with a terrible disease. Their gums were cracked, congested and swollen, their teeth were loose, their faces were swollen, and their skin was bruised and bruised. Later, the doctor divided these patients into six groups and gave them fruit wine, alum preparation (a crystalline salt), vinegar, sea water, lemons and nutmeg respectively. They found that those who ate two lemons a day quickly recovered their health. Please analyze:

1. What disease did the team members on the ship have? scurvy

2. Why can lemon treat this disease? Lemon contains more VC

3. What is the reason why seafarers are most likely to get this disease?

Because seafarers live on ships far away from the mainland for a long time, they cannot eat fresh vegetables and fruits.

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Update Time: 2024-06-30

This template belongs to biology courseware People's Education Press seventh grade biology book volume 2 industry PPT template

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