"Food for Humans" PPT download

"Food for Humans" PPT download

Part One: Objectives and Focus

【learning target】

1. Try to analyze the nutrients in food and explain the important effects of various nutrients on the human body.

2. Improve experimental operation skills and expression and communication skills by exploring the nutritional components of food.

[Important and difficult points]

1. Focus: Nutrients in food.

2. Difficulty: The important role of various nutrients on the human body.

Human Food PPT, Part 2: Review and Preview

Review the past and learn the new

1. The nutrients in food mainly include six categories: water, ____, ____, ____, ____ and vitamins.

2. Carbohydrates, fats and proteins provide ____, often referred to as the "three thermogenic nutrients".

3. Carbohydrate is the most important ____ substance in the human body; protein is the ________ substance that makes up human cells; fat is usually used as an energy substance for ____. ________ neither participates in cell formation nor provides energy, but plays an important role in the life activities of the human body.

independent preview

1. Nutritional components of food (Textbook P1-5)

1. The nutrients in food mainly include six categories: _____, _______, ________, _______, ________ and _______. Among them, _____ and _______ are inorganic substances, and the remaining four are organic substances. What are often referred to as the “three thermogenic nutrients” are: ______, _____, _______.

2. Testing of nutritional components in food (Textbook P3-4)

3. The role of nutrients in food (Textbook P5-6)

Water: accounts for about ________ of body weight and is the main component of ________.

2. Inorganic salts: only account for 4% of body weight, but their role is very important. Inorganic salts containing ________ are important components of bones. Children suffering from calcium deficiency will suffer from ________ disease (adults suffering from calcium deficiency will suffer from ________ disease, and the elderly suffering from calcium deficiency will suffer from ________). Foods such as ________ should be supplemented. ________ is a component that makes up hemoglobin. If it is lacking, it will cause ________. Foods such as ________ should be supplemented.

Human Food PPT, Part 3: Cooperative Learning

Study 1 Explore the nutritional content of food

Study 2: The role of nutrients

Nutrients required for human life activities are mainly obtained through food. It is known that the main nutrients in food include water, inorganic salts, vitamins, sugars, fats, proteins, etc.

In Xiao Ming’s recipes, rice, potatoes, lean meat, milk, peanuts, sesame seeds, mustard greens, oranges, etc. are common ingredients.

(1) Among the foods listed above, those with more starch content are ______, those with more protein content are ______, those with more fat content are ______, and those with more vitamin content are ______.

(2) Xiao Ming also loves to drink sweet and sour juice. According to the testing method of vitamin C, could you please find a way to quickly compare the vitamin C content in peach juice and pear juice?

Method 1: Take two clean test tubes, add 2 mL of peach juice and pear juice respectively, then add iodized starch solution with a dropper, observe the fading changes of the iodized starch solution, and record the iodized starch used for complete fading. The number of drops of solution, the more drops used, the greater the vitamin C content.

Method 2: Take two clean test tubes, add 2 mL of iodized starch solution, and then add peach juice and pear juice solutions respectively. Observe the fading changes of the iodized starch solution. When the fading reaction no longer occurs, record the amount of water used. The number of drops of peach juice and pear juice solutions. The more drops used, the lower the vitamin C content.

Human Food PPT, Part 4: Apply What You Learn

A. Preview test

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

A. Has the function of transporting nutrients

B. It is the source material of energy

C. Is one of the sources of water in human cells

D. Can transport waste

2. Which of the following is not the main organic matter that makes up cells ( )

A. Fat

B.Sugar

C.Protein

D.Water

3. Which of the following groups of nutrients are not energy substances in the human body, but are very important for maintaining normal life activities? ( )

A. Carbohydrates and vitamins

B. Vitamins, inorganic salts

C. Protein, fat

D. Minerals and proteins

4. The basic substances and main components that make up human cells are ( )

A.Proteins and carbohydrates

B. Protein and fat

C. Protein and water

D. Protein and inorganic salts

Keywords: Beijing Normal University Edition Biology PPT courseware for seventh grade volume 2 free download, human food PPT download, .PPT format;

For more information about the "Nutrition of the Human Body and Food for Humans" PPT courseware, please click the "Nutrition of the Human Body ppt and Human Food ppt" tag.

"Human Food" PPT courseware:

"Human Food" PPT Courseware Part One: Nutrition in Food What nutrients are in human food? Why do we need these foods? Testing of nutrients. Testing of water. After baking, water droplets appeared on the wall of the test tube. Detection of inorganic salts...

"Human Food" PPT:

"Human Food" PPT Part One: Think About It Do you know which organisms human food comes from? Why do we eat these foods? What nutrients can food provide us? do you know? 1. Have you ever eaten tofu? Its main...