"Human Immunity" PPT courseware download

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"Human Immunity" PPT courseware download

Part One: Situation Import

There are many pathogens in the natural environment where people live. Once these pathogens invade the human body, they may cause diseases and damage people's health. Why can people live healthily in an environment with a large number of pathogens?

learning target

1. Describe the three lines of defense of the human body (key points)

2. Distinguish between specific immunity and non-specific immunity (key points)

3. Name the function of immunity

4. Understand the significance of planned immunization

Human immunity PPT, part 2: human body defense line

Try to summarize: What are the three lines of defense of the human body?

Step One: Skin and Mucous Membranes

The second path: phagocytes and bactericidal substances

Track 3: Immune cells and immune organs

Information 1: Someone once conducted an experiment: a pathogenic streptococcus was applied to the clean skin of healthy people, and then checked again after 2 hours, and it was found that more than 90% of the streptococci were eliminated.

Why do germs die quickly when applied to clean skin? What does this say about the function of skin?

What do the respiratory tract and digestive tract rely on to implement their protective functions?

Cilia on the respiratory mucosa remove foreign matter (including germs)

Human immunity PPT, part 3: distinguishing between antigens and antibodies

Antibodies: When a pathogen invades the human body, it stimulates lymphocytes, which can produce a special protein called an antibody that resists the pathogen.

Antigen: Substances that cause the body to produce antibodies (such as chickenpox virus and other pathogens) are called antigens

Antibodies: serum, immunoglobulin (found in breast milk)

Antigens: pathogens, allergens, transplanted organs, vaccines, cancerous, aging, dead cells

Thinking: After the antigen is eliminated, can the body still maintain the ability to produce corresponding antibodies? How does the body respond when invaded again?

When the same antigen invades the human body again, the body will quickly produce a large number of corresponding antibodies and then eliminate the antigen in the same way.

1. A patient who was stabbed by a rusty iron nail was promptly injected with anti-tetanus serum at the Centers for Disease Control and Prevention. The injected substances and immune types are ( )

A. Antibody, specific immunity B. Antigen, specific immunity

C. Antibody, non-specific immunity D. Antigen, non-specific immunity

2. Which of the following items is not an antigenic substance ( )

A. Aged, dead or damaged cells B. Tumor cells

C. Tetanus bacillus D. Protein that resists pathogens

Human immunity PPT, part 4: immunity concept

Immunity is a defensive function of the human body. The human body relies on this function to identify "self" and "non-self" components, thereby destroying and rejecting antigenic substances that enter the body, such as pathogens, or damaged cells and tumors produced by the human body itself. cells, etc., to maintain the health of the human body.

Is the stronger the immune system, the better?

No, when the immune system is too strong, certain foods and drugs entering the human body can cause allergic reactions.

Allergens: Substances that cause allergic reactions are called allergens.

Such as: pollen, dust

Note: When performing organ transplantation, rejection of allogeneic organs occurs, so matching organs must be found.

vaccine

Biological products are usually made from killed or attenuated pathogens. After being inoculated into the human body, they can cause the human body to produce corresponding antibodies, thereby improving resistance to specific infectious diseases.

planned immunization

Planned immunization is based on national requirements for the elimination of infectious diseases, and planned vaccinations are carried out among susceptible groups to effectively enhance the body's immunity.

Human immunity PPT, part 5: training to meet standards

1. Among the following options, which one belongs to specific immunity ( )

A． Skin and mucous membranes block pathogens from invading the body

B. Antibodies against the corresponding pathogen

C． Lysozyme dissolves germs

D. White blood cells engulf and digest pathogens

2. After a dog is injured, it will lick the wound with its tongue, which is beneficial to the healing of the wound. The reason is that the saliva contains bactericidal substances ( )

A. Antibody B. Digestive enzyme C. Lysozyme D. Auxin

3． When H1N1 was raging and the vaccine was not in sufficient supply, the government first provided H1N1 vaccines to hospital medical staff and school teachers and students. The immunity types of influenza A vaccine and injection of influenza A vaccine respectively belong to ( )

A. Antigen, non-specific immunity B. Antibody, specific immunity

C. Antigen, specific immunity D. Antibody, non-specific immunity

4． During organ transplantation, the patient's immune system will reject the foreign organ to varying degrees. The transplanted organ is equivalent to ( )

A.Antigen B.Antibody

C. Protein D. Growth hormone

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"Human Immunity" PPT teaching courseware:

"Human Immunity" PPT teaching courseware Part One: Introduction of new lessons There are many pathogens in the natural environment where people live. Once these pathogens invade the human body, they may cause diseases and damage people's health. Why can people survive in an environment where a large number of pathogens exist...

"Human Immunity" PPT download:

"Human Immunity" PPT Download Part One Content: New Lesson Knowledge Points Knowledge Point 1 Human immunity includes non-specific immunity and specific immunity 1. Non-specific immunity (1) Concept and characteristics Non-specific immunity is innate and is responsible for many types of immunity. Pathogens all work, but...

"Human Immunity" PPT courseware:

"Human Immunity" PPT courseware Part 1: Teaching objectives: Master the knowledge of the three lines of defense of the human body to defend itself. Understand the concept and function of immunity, and distinguish between non-specific immunity and specific immunity of the human body. Explain the meaning of planned immunization... ... ... people...

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Update Time: 2024-09-07

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

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