Catalyst # 3 Pg.

1.What is the scientific name for a white blood cell?

2.What specific types of leukocytes are involved in the inflammatory response?

3.Why do you think there a multiple types of white blood cells?

Semester 2 Table of Contents1. Unit 5 Learning Log-

Pg. 12. Lesson 57- Viruses and Bacteria Pg. 3-63. Lesson 58- White Blood Cells Pg. 7-104. Lesson 59- Types of Immune Defenses Pg. 11-14

Assigned Vocabulary- Due: 1/30-1/313. Macrophage4. Lymphocyte5. Neutrophil6. Leukocyte7. Antibody8. Antigen9. Specific Defense10. Non Specific Defense

Vocabulary Due

AnnouncementsVocabulary Due- Next Th/FriVocabulary Due- Next Th/FriHomework Questions Due- Homework Questions Due- Mon/TuesMon/Tues

11stst Quiz of the Semester- Quiz of the Semester- Next Th/FriNext Th/Fri

Pre- Reading NotesPg. ___

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Get Ready For Notes- Pg.

Title: Types of Immune System Defenses

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Learning Target Explain the mechanisms Explain the mechanisms the immune system uses to the immune system uses to fight infection.fight infection.

Antibodieshttp://www.youtube.com/watch?http://www.youtube.com/watch?v=KpNFAEbLcvk&feature=relatedv=KpNFAEbLcvk&feature=related

3D:3D:http://www.youtube.com/http://www.youtube.com/watch?watch?v=lrYlZJiuf18&feature=relatv=lrYlZJiuf18&feature=relateded

What kind of mechanisms does our immune system have to

fight disease?

A. Reminders: Pathogen = any agent (thing) that causes disease.

ex: bacteria, viruses, microbes,

etc. The immune system fights infection by trying to keep you healthy.

B.

There are two ways it does this: 1. Nonspecific Responses2. Specific Responses

1. Nonspecific Defenses

EX: Your skin secretes oil and sweat, which help to kill bacteria (makes the skin acidic, bacteria don’t like to live in these conditions).

Other examples: mucus, tears, inflammation, and fever

Inflammation-when part of the body becomes when part of the body becomes reddened, swollen, hot, and often painfulreddened, swollen, hot, and often painful a reaction to injury or infection.a reaction to injury or infection.

2. Specific Defenses

= ways that your body specifically fights against certain pathogens.

ex: antibodies, produced by white blood cells

If a pathogen is able to get past the body’s nonspecific defenses, the immune system reacts with specific defenses.

Specific defenses that attack the particular pathogen (disease-causing agent) are called immune responses.

This is triggered by an antigen.

2. Continued

3. AntigensWhat is an antigen?

•Anything that triggers an immune response – like an ID card of pathogens (ex: virus, bacteria, other pathogens)

•Each pathogen has its own antigen

4. Antigens on Pathogens

Antigens are how your immune system knows what to attack.

Cells, bacteria, viruses, etc. have special things on them that help your immune system to either recognize them (because they are part of your body) or see that they are invaders and should be attacked.

These protein markers are called: Antigens.

5. To fight against pathogens …

Once your immune system sees that an invading pathogen has antigens (markers/IDs) that it does not recognize, it decides to FIGHT against it!

WHITE BLOOD CELLS create little proteins to recognize the pathogens. These are specific to that certain type of pathogen and help destroy the invaders.

These = ANTIBODIES

6. White Blood Cells

Look for the protein markers (ANTIGENS) on pathogens

When they see a pathogen, they create little proteins to attach to the pathogen

***These proteins that attach to pathogens are called Antibodies****

What are Antibodies? Antibodies are proteins that recognize and bind to antigens (of pathogens)

What do antibodies do? Antibodies are carried in the bloodstream to attach to the pathogen and signal an immune response

As the antibodies overcome the infection, the plasma cells die out and stop producing antibodies

7. Antibodies

Your body produces hundreds of antibodies just in case some happen to fit actual antigens!

* Antibodies have a specific shape and fit with a certain pathogen’s antigen

Antibodies

Which of the following is a

SPECIFIC defense??A.White blood cellsB.Skin

Which of the following is a

NON-SPECIFIC defense??

A.White blood cellsB.Skin

Homework Questions Due:

1.1. What is the difference What is the difference between specific and non between specific and non specific defense?specific defense?

2.2. What is the role of an What is the role of an antibody?antibody?

3.3. Why do you think the body Why do you think the body has developed 2 different has developed 2 different types of immune defenses? types of immune defenses?

Literature Circle- Pg. ___

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Preview Information That Is Coming Uphttps://https://

www.khanacademy.org/www.khanacademy.org/science/biology/science/biology/immunology/v/types-of-immunology/v/types-of-immune-responses--innate-immune-responses--innate-and-adaptive---humoral-and-adaptive---humoral-vs--cell-mediatedvs--cell-mediated