The Immune System - PowerPoint PPT Presentation

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The Immune System

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The Immune System Which leads to malabsorption (cant absorb things) * * Objectives SWBAT describe and interpret the function of the immune system and its major ... – PowerPoint PPT presentation

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Title: The Immune System


1
The Immune System
2
Objectives
  • SWBAT describe and interpret the function of the
    immune system and its major cells including
    macrophages, antibodies, T-cells, etc.

3
Celiac Disease
  • Immune Reaction to gluten (protein in wheat,
    barley, and rye)
  • Gluten triggers an immune response in the small
    intestine
  • This produces inflammation and damages the small
    intestine lining which leads to ____________
  • Treatment
  • Strict non-gluten diet

4
What does the immune system do?
  • Fight off infection by keeping foreign (not
    suppose to be there) cells OUTSIDE the body and
    by making cells that kill those bad cells if they
    get in.

5
2 Types of Defenses
  • Nonspecific guards against everything equally
    does not pick and choose
  • Specific targets individual (one type of)
    invaders

6
Nonspecific Defenses 1st Line
  • Skin, mucus, sweat, tears
  • Skin is the most important nonspecific defense
  • Keep pathogens (organisms that can infect)
    outside
  • How? Enzymes and acid in secretions kill bacteria

7
Nonspecific Defenses 2nd Line
  • Pathogens that enter release toxins causing
    inflammatory response
  • Your body makes millions of white blood cells to
    fight the intruder
  • Body raises temperature to kill pathogens (fever)

8
Review
  • Pathogen tries to invade your cell- what does it
    encounter?
  • Compare this to a line of defense for a sport.

9
Specific Defenses
  • Specific attacks are triggered by antigens
  • Antigen foreign substance such as virus,
    bacteria, or other pathogen (intruder)
  • Our bodies have a few specific attackers
  • B cells
  • T cells

T Cell Killing Cancer
B Cell
10
Specific Defense Humoral Immunity (B Cells)
  • B cells recognize antigens
  • B cells make antibodies
  • Antibodies recognize and bind (connect) to
    antigens to kill/inactivate them
  • Memory B cells also made to help fight off future
    invasions faster

11
Specific Defense Cell-mediated immunity
The Last Line
  • If the pathogen gets by all other defenses and
    into the cell, this is how to solve the problem
  • Killer T cells track down and destroy cells with
    antigens inside
  • Memory T cells are made to recognize antigen if
    it invades again

12
Review
  • A pathogen breaks through your skin. What does it
    encounter?
  • Compare this to a sport.

13
Check For Understanding
  • Does your skin choose which pathogens to protect
    you from?
  • So skin is an example of a ______________ immune
    defense

nonspecific
  • Any Killer T cell can kill any cells infected by
    a pathogen (bad invader)
  • Once your body makes more antibodies to the flu,
    you have the antibodies to fight all viruses.

True or False
True or False
14
Cartoon
  • YOU (individually) will turn in a cartoon
    depicting the different types of cells in your
    immune system.
  • Half Specific other half of the room
    non-specific
  • End of class- share with a neighbor
  • Ms. Lin will show an example.
  • Anything unfinished will be homework.

15
Scenario 1 Non-specific
  • Its Monday. The teacher has moved your seat. Your
    new neighbor smells like he hasnt showered in
    weeks. In the middle of lecture your neighbor
    falls asleep and unfortunately, his body slumps
    over onto yours. His drool and snot gets all over
    your arm.
  • Describe your bodys first line of defense in a
    comic book style format. Include pictures and
    descriptions.

16
Scenario 2 Specific
  • Its Tuesday. Thanks to your first line of defense
    you have survived David the Drooler. But,
    unfortunately for you, Melvin was absent the day
    his kindergarten teacher discussed not walking
    around with scissors. During an activity Melvin
    trips over someones soccer equipment bag and
    stabs you right in the arm with a pair of
    scissors! Oh no! The scissors are loaded with
    germs! The germs have clearly gotten past your
    first line of defense. Describe your bodys
    second line of defense in a comic book style
    format. Include pictures and descriptions.
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