"Nutrition Substances in Food" Chemistry and Social Life PPT Courseware 3

Description

"Nutrition Substances in Food" Chemistry and Social Life PPT Courseware 3

learning target

1. Understand the main nutrients contained in food;

2. Understand the sources of various nutrients and their effects on the human body.

3. Understand the sources and deficiencies of inorganic salts and vitamins;

Focus: Types of nutrients and their functions

Difficulty: Sources and deficiencies of inorganic salts and vitamins

ANALYSE information:

Each student selects 1 to 2 commonly eaten foods and refers to the "Common Food Composition List" on pages 38 to 39 of the textbook to see what nutrients each of these foods contains.

discuss:

①Are the types and amounts of nutrients contained in different foods the same? What implications does this have for your food choices?

② Cell life cannot be separated from matter and energy. So what is the relationship between the nutrients in food and the substances and energy required by human cells?

in conclusion:

① Different foods contain different types and amounts of nutrients.

② Nutrients in food are the source of substances and energy required by human cells.

Food contains six types of nutrients including sugar, fat, protein, water, inorganic salts and vitamins.

Self-study guidance

Content: Textbook P19-20, P22-24

Time: Independent self-study for the first 5 minutes, discussion and communication for the next 3 minutes

Require:

(1) Understand the functions of sugars, fats, and proteins, and understand their sources in conjunction with Figures 4-17, 4-18, and 4-19;

(2) Use Table 1 on P23 of the textbook to learn the symptoms and food sources of inorganic salt deficiency;

(3) Use Table 2 on P24 of the textbook to learn the symptoms and food sources of vitamin deficiency.

Timed training (5 minutes)

(1) Food contains six types of nutrients: ______, ______, ______, ______, ______ and ______.

(2) The "Student Milk Plan" is to ensure that students get enough ______ every day, because human growth and development as well as the repair and renewal of damaged cells are inseparable from ______.

(3) Eating more green vegetables, fruits, carrots and other foods can prevent ______, because the carotene contained in these foods can be converted into ______ in the human body.

(4) The most abundant substance in the human body is ______

(5) The substance that accounts for about 4% of the human body is ______

(6) It is neither a component of cells nor an energy substance of the body, but a substance that regulates life activities and growth and development is ______

(7) Under normal circumstances, the most important energy storage substance in the human body is ( )

A. Protein B. Carbohydrate C. Fat D. Inorganic salt

(8) The elderly suffer from osteoporosis because their bones lack one of the following nutrients ( )

A. Protein B. Fat C. Vitamin D. Inorganic salt

(9) The foods that patients with beriberi should eat are ( )

A. Lamb liver B. Standard powder C. Egg D. Tomato

power enhanced

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 preparations (a kind of crystalline salt), vinegar, sea water, lemons and nut beans 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?

(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.

Class summary:

What did you gain from studying this class?

Operation

1. Search for information: What is green food? Is there a sign? Are there levels?

2. Make yourself a recipe for three meals a day based on the "Common Food Ingredient List" attached on pages 38-39 of the textbook.

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For more information about the PPT courseware "Chemistry and Social Life Nutrients in Food", please click the Chemistry and Social Life ppt Nutrients in Food ppt label.

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Update Time: 2024-11-12

This template belongs to Chemistry courseware Beijing Curriculum Reform Edition Ninth Grade Chemistry Volume 2 industry PPT template

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