"The release of energy in food" PPT free download

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"The release of energy in food" PPT free download

Part One: Learning Objectives

1. The essence and significance of respiration.

2. Methods to detect oxygen and carbon dioxide.

Important and difficult points

1. Key points: The essence and significance of respiration.

2. Difficulty: How to detect oxygen and carbon dioxide.

PPT on the release of energy in food, part 2: review the past and learn the new

1. The three major thermogenic nutrients in the human body are ______, ______, and ______. Among them, the energy for life activities mainly comes from ______, and ______ is the reserve energy substance.

2. Definition of respiration: The process in which biological cells use ______ to decompose ______ and other organic matter into carbon dioxide and water, and release ______ at the same time. Part of the energy released by cells through respiration is used to maintain ______, and the other part is used to promote various ______. Therefore, respiration provides ______ for life activities.

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1. Energy stored in food (Textbook P50)

1. The _____ released when each gram of food is fully burned outside the body is the _____ of the food.

2. The caloric price of sugar is _____kcal/g, the caloric price of fat is _____kcal/g, and the caloric price of protein is _____kcal/g.

3. The energy for human life activities mainly comes from _____, followed by _____, and _____ is also a stored energy substance.

2. Cells release energy through respiration (Textbook P50-51)

1. The process in which living cells use ______ to decompose ______ and other organic matter into carbon dioxide and water, and release ______ at the same time, is called ______.

2. Part of the energy released by cells through respiration is used to maintain ______, and the other part is used to promote various ______. Therefore, respiration provides ______ for life activities.

PPT on the release of energy in food, part 3: cooperative learning

Study 1: Energy stored in food

1. As shown in the table, the main ingredients except water and inorganic salts in a total of 4 foods A, B, C, and D (100 grams each) are listed. Which food in the table can provide more energy? ()

A． A B. B C． C D. D

The content of sugar, fat and protein in D is high, and D food can provide more energy.

Exploration 2. Examine the changes in the composition of human exhaled gas

2. Based on the diagrams and information on P50 of the book, answer the following questions:

Conclusion: The air exhaled from the lungs is less ______ than the air inhaled, and ______ is more.

The reason is that cells consume ______ and release ______ through respiration.

PPT on the release of energy in food, part 4: summary

1. Human body’s nutrients and energy come from food. The energy required for life activities mainly comes from carbohydrates, followed by fat.

2. The caloric value of food: the energy released when each gram of food is fully burned outside the body. Fat has the highest caloric value and can be used as a reserve energy substance.

3. The energy released by cells through respiration is used to maintain body temperature and various life activities.

4. The experiment "Detection of Human Exhaled Gas" proved that the gas exhaled from the lungs has less oxygen and more carbon dioxide than the inhaled air.

PPT on the release of energy in food, Part 5: Apply what you learn

A. Preview test

1. Among the following nutrients, the ones that can provide energy for human life activities are ()

①Carbohydrates ②Fat ③Protein ④Water ⑤Inorganic salts

A． ①③⑤ B. ①②④ C． ①②③ D. ①②⑤

2. Among the following equal amounts of food, the one that releases the most heat when burned is ( )

A． Steamed buns B． Peanuts c. corn d. apple

3. The respiration of humans and plants is of great significance and provides the life activities of cells ()

A． Oxygen b. water c. Nutrients D. energy

4. Which of the following is not a result of respiration? ()

A． Release carbon dioxide B. Produce oxygen C. Release energy D. generate water

Keywords: Beijing Normal University Edition Biology PPT courseware for seventh grade volume 2 free download, PPT download on the release of energy in food, .PPT format;

For more information about the PPT courseware "Energy Supply of the Human Body and the Release of Energy from Food", please click the "Energy Supply of the Human Body ppt Release of Energy from Food" ppt tag.

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Update Time: 2024-10-02

This template belongs to biology courseware Beijing Normal University Edition Seventh Grade Biology Volume 2 industry PPT template

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