"Human Immunity" PPT

Description

"Human Immunity" PPT

Part One: Situation Import

Why do people get sick? Why are most people less likely to get sick?

Pathogen invasion. Usually people have a certain degree of resistance

learning target

1. Describe the immune function of the human body;

2. Give examples of the difference between specific immunity and non-specific immunity of the human body;

3. Explain the significance of planned immunization; cultivate the ability to use learned biological knowledge to analyze and solve problems encountered in real life.

Self-study study case

1. What are the two types of human immunity? What's the difference between the two?

2.What do antigen and antibody mean respectively?

3. What are the functions of immunity?

4. Why can vaccination prevent infectious diseases? What is planned immunization?

Human immunity PPT, part 2 content: course exploration

Explore theme one

Non-specific immunity and specific immunity

1. Non-specific immunity

When pathogens invade the human body, the barrier function of the skin and mucous membranes

Data analysis: Scientists once conducted an experiment: they applied a toxic streptococcus on the hands of healthy people and checked after 3 minutes. There were 30 million of these bacteria. After 60 minutes, there were only 1.7 million of them. ; Checked after 120 minutes, there were only 3,000 left. Why?

2. Specific immunity

Discussion: Why can people who have had chickenpox resist the invasion of the chickenpox virus?

What do antigen and antibody mean respectively?

(1) Antibodies: After a pathogen invades the human body, it stimulates lymphocytes, and the lymphocytes produce a special protein called an antibody that resists the pathogen.

(2) Antigen: a substance that causes the body to produce antibodies (such as pathogens and other foreign matter).

(3) Specific immunity: produced after birth and only works against a specific pathogen.

3. Comparison of non-specific immunity and specific immunity

Common features: eliminate and eliminate pathogenic microorganisms that invade the human body and maintain human health.

4.The significance of immunity

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 foreign invading substances entering the human body, as well as damaged cells and tumor cells produced by the human body itself. To maintain the balance and stability of the human body's internal environment.

discuss:

1. When grafting skin on a patient with severe burns, should the patient's own healthy skin be used or someone else's healthy skin? Why?

2. Why do some people have allergic reactions in life?

3. Vaccination can effectively enhance the body’s immunity. Which vaccines have you ever received?

Explore theme two

planned immunization

Planned immunization: In accordance with national requirements for the elimination of infectious diseases, vaccination is carried out in a planned manner among susceptible groups.

Human immunity PPT, part three: 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. (2011·Jining Academic Examination) Animals often lick their wounds with a tongue full of saliva, which is beneficial to wound healing. Among the following options, the one with the same immune type is ( )

A. Taking sugar pills to prevent polio

B. Vaccination with BCG vaccine to prevent tuberculosis

C. White blood cells phagocytose germs that invade the tissue

D. Inject hepatitis B vaccine

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

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

For more information about the "Healthy Living Human Immunity" PPT courseware, please click the Healthy Living ppt Human Immunity ppt tag.

"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 courseware download:

"Human Immunity" PPT courseware download Part One: Situation Introduction 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...

File Info

Update Time: 2024-10-21

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

Preview