"Important Nutrients for Humans" Chemistry and Life PPT Courseware 5

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"Important Nutrients for Humans" Chemistry and Life PPT Courseware 5

Nutrients: protein, carbohydrates, fats, vitamins, inorganic salts and water

1. Protein

Function: Protein is the basic material that makes up cells and the main raw material for the body's growth and repair of damaged tissues. It is a biologically active substance.

Source: Meat, eggs, milk, seeds of certain plants.

Composition: Proteins are complex compounds composed of a variety of amino acids.

Read page 86 about "protein" and answer the following questions:

⑴What does protein consist of? __________________

⑵What foods are rich in protein? (i.e. the main source of protein)____________________

⑶Types of protein____________________

⑷The process and function of human body digesting protein:

knowledge accumulation

1. Protein intake should be neither insufficient nor excessive.

Insufficiency: The human body may experience symptoms such as developmental delay and weight loss;

Excessive amount: It will increase the burden on the digestive tract, liver and kidneys.

2. Hemoglobin: Hemoglobin is composed of protein and heme.

3. Hemoglobin is the carrier of gas exchange in the human body. In the lungs, Fe2+ of heme in hemoglobin combines with oxygen to form oxyhemoglobin, which flows with the blood to various tissues and organs of the body, releasing oxygen for oxidation in the body. At the same time, hemoglobin combines with carbon dioxide in the blood and carries it to the lungs for exhalation.

discuss

1. Why can’t the woolen clothes that have entered our ordinary people’s homes be washed with ordinary soap (alkaline)?

Because wool clothing contains protein, the structure of the protein will be destroyed under alkali conditions, and ordinary soap is alkaline, so it cannot be washed with ordinary soap.

[Thinking] In recent years, some medicated toothpastes have been mixed with a small amount of formaldehyde to protect the periodontal period, thereby eliminating the pain caused by tooth sensitivity to heat, cold, and acid. Please tell me the reason.

Answer: Formaldehyde can denature and solidify the proteins in the tissues around the teeth, thereby forming a protective film on the periodontal tissues.

Why can formaldehyde aqueous solution be used to soak animal specimens?

Answer: Formaldehyde can denature proteins in animals and lose their original physiological functions, thereby inactivating animal cells, thus playing a preservative role and preserving specimens for a long time.

Students, think about it: Can formaldehyde be used to soak seafood? Why?

【summary】

1. Nutrients include six categories: protein, sugar, oil, vitamins, inorganic salts and water.

2. Protein is the basic material that makes up cells and the main raw material for the body to grow and repair damaged tissues. It is one of the main basic substances of life. It performs various functions and plays various roles in human life activities.

3. Sugars and fats release energy through oxidation in the human body, providing energy for body activities and maintaining a constant body temperature.

4. Vitamins can regulate metabolism, prevent diseases and maintain good health.

5. Do not blindly increase or decrease the intake of certain nutrients. No matter what kind of nutrient, too much or too little will affect your health. We must have a balanced diet, not be picky about food, and not have a partial eclipse.

Factors that denature proteins:

Strong acid Strong base Heavy metal salt

Heating UV

1. Some people use formaldehyde water to soak aquatic products and sell them. What are the dangers of doing so?

Answer: Because formaldehyde denatures the proteins in aquatic products, it can cause harm to the body.

2. Hospitals commonly use the following methods for sterilization and disinfection. Please explain why:

Boiling method to sterilize medical equipment

UV irradiation ward

Use an alcohol cotton ball to rub the skin during the injection

3. If you accidentally take heavy metal salts, what methods can be taken to relieve symptoms before going to the hospital?

Take a large amount of milk or soy milk immediately

Application migration to consolidate and improve

Example 1. The picture is part of the instructions on a certain food package. Please select a qualifying substance from the ingredients marked and fill in the corresponding blanks below:

(1) _________ is rich in protein;

(2) _________ is rich in fat;

(3)__________ belongs to vitamins;

(4) _________ are inorganic salts.

Example 2. A certain beverage is prepared from purified water, sucrose, apple juice, vitamin C, vitamin A, calcium lactate, etc. The nutrients this drink does not contain are ( )

A. Carbohydrates B. Vitamin C. Water D. Oils and fats

Example 3. The reason why glucose is widely used for patient infusion in medicine ( )

A. Glucose is an essential nutrient for the human body.

B. Glucose is composed of three elements: C, H, and O.

C. Glucose can be directly "metabolized" in the human body

D. The energy released when each gram of glucose is oxidized is more than the energy released when the same mass of oil is oxidized.

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For more information about the PPT courseware "Chemistry and Life Important Nutrients for Humans", please click the Chemistry and Life ppt Important Nutrients for Humans ppt tag.

"Important Nutrients for Humans" Chemistry and Life PPT Courseware 4:

"Important Nutrients for Humans" Chemistry and Life PPT Courseware 4 Learning Objectives 1. Know that nutrients refer to six types of substances: protein, sugar, oil, vitamins, inorganic salts and water 2. Understand the relationship between protein, sugar, oil and vitamins and human beings Healthy relationships and staple foods..

"Important Nutrients for Humans" Chemistry and Life PPT Courseware 3:

"Important Nutrients for Humans" Chemistry and Life PPT Courseware 3 Life lies in movement, and movement requires energy consumption. Therefore, we need to consume different foods to supplement various nutrients. So, what nutrients are in food? 1. Protein ..

"Important Nutrients for Humans" Chemistry and Life PPT Courseware 2:

"Important Nutrients for Humans" Chemistry and Life PPT Courseware 2 Teaching Objectives Knowledge and Skills 1. Understand that nutrients refer to six substances including protein, sugar, oil, vitamins, inorganic salts and water; 2. Understand the relationship between proteins, carbohydrates, fats, vitamins and human health...

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Update Time: 2024-11-23

This template belongs to Chemistry courseware People's Education Press Ninth Grade Chemistry Volume 2 industry PPT template

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