"Immunity and Planned Immunization" Infectious Diseases and Immunity PPT Courseware 2

Description

"Immunity and Planned Immunization" Infectious Diseases and Immunity PPT Courseware 2

question

1. Why do people get sick?

2. Why do most people not get sick easily?

Answer 1: Pathogen invasion

Answer 2: Usually people have some resistance

non-specific immunity

The first line of defense (composed of skin and mucous membranes)

Barrier effect of skin and mucous membranes

The cleaning action of cilia on mucous membranes

Bactericidal effect of skin secretions

The second line of defense (composed of lysozyme and phagocytes)

Lysozyme dissolves bacteria

Phagocytes engulf pathogens

White blood cells destroy pathogens

Non-specific immunity: innate, defensive against a variety of pathogens

antigen

Substances that can cause the body to produce a specific immune response (substances that cause the body to produce antibodies). Such as pathogens, xenogeneic animal serum, etc.

Antibody

Special proteins produced after stimulation by antigens that can resist pathogens

feedback exercise

1. Among the following functions of the skin, the one that belongs to the immune function is ( )

A. Prevent bacterial invasion B. Prevent water evaporation

C. Feel external stimulation D. Regulate body temperature

2. What can engulf and destroy pathogens in the human body ( )

A. Respiratory mucosa B. Lymphocytes

C. Antibodies and antigens D. Phagocytic cells

3. Among the following phenomena, which one belongs to specific immunity ( )

A. The bactericidal effect of saliva B. Vaccination with DPT vaccine

C. White blood cells phagocytose germs D. Barrier function of skin

4. Immune cells are mainly ( )

A. Phagocytes B. Glandular cells

C. Epithelial cells D. Lymphocytes

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"Immunity and Planned Immunization" Infectious Diseases and Immunity PPT Courseware 3:

"Immunity and Planned Immunization" Infectious Diseases and Immunity PPT Courseware 3 Data Analysis 1. Someone once did an experiment: a pathogenic streptococcus was applied to the clean skin of healthy people, and then checked again after 2 hours, and found that 90% The above streptococci were eliminated. Why apply it on...

"Immunity and Planned Immunization" Infectious Diseases and Immunity PPT Courseware:

"Immunity and Planned Immunization" PPT courseware on infectious diseases and immunity 1. The three lines of defense of the human body The reason why people can live healthily in an environment with a large number of pathogens is because the human body has lines of defense to defend itself. So, what exactly are the lines of defense? Why apply it to clean...

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Update Time: 2024-11-17

This template belongs to biology courseware People's Education Edition Biology for Grade 8, Volume 2 industry PPT template

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