Transcript When the castle walls have been breached: The

Wednesday Warm Up
5/25
1. What do the mucous membranes do in the
immune system?
2. What is your body’s first line of defense?
3. If you have already been exposed to a virus,
you will not get sick from it a second time. What
type of immunity is this?
• Turn in Reading Guide 31.1 and Epidemic
Reading Questions
Wednesday Agenda
• Today
– Objective: Differentiate between nonspecific
and specific defenses.
– Examine different parts of the immune system
and the roles they play
– Textbook Activity
– Video Clip
Final Weeks
• Library
– 3rd Period: Tues. 5/31 and Wed. 6/1
– 4th Period: Fri. 5/27 and Tues. 5/31
• Next Week
– Gather information and work on Project (Disease Brochure)
• Last Week
– Projects Due June 6th
– Gallery Walk Presentations June 6th and June 7th
– Dissection (Hopefully!)
• Have to be passing and turned in BOTH projects
Directions
• Get out the worksheet (31.2) from yesterday
• Add the words to your vocabulary chart in your
notebook
• Leave space to add in the definitions
• I will provide you with analogies for the “How to
Remember” section of your chart
When the castle is under attack!
The Immune System Response
Your immune system contains many structures
and cells, each playing a particular role in policing
your body and destroying invaders
Your Skin- The Fortress or Gate
• In order to get a pathogen, it must first
breach our skin.
– Enters through a cut or open surface
Phagocytes or Macrophages
The Guards
• “Eater” cells surround and
engulf germs that have
recently entered the body.
Antigens- The Germ’s Fingerprint
• An antigen is a protein or particle on the surface
of a bacteria or virus (the germ’s fingerprint)
Antibody- Warrant of Arrest
• An antibody is a
particle made by the
body that matches
antigens produced by
pathogens.
• Antibodies attach to
germs, identifying
them as a targets.
Your body produces hundreds of antibodies to
target different antigens!
Interferons- Crime Prevention
• Once a cell has been
infected, it releases
interferons.
• Interferons trigger
healthy cells to produce
enzymes that block
virus infections
• Use past information to
prevent future “crimes”
T-cells
The Navy SEALs
• When the guards
(macrophages) can’t
catch the bad guys,
our immune system
sends in T-cells to get
the job done.
• Navy SEALs are a
specialized group like
T-cells.
B cells- The Undercover Cops
• B cells are covered in
antibodies.
• They float around
waiting to attach to an
antigen, just like
undercover cops gather
enough evidence to nail
the criminals.
From The Departed
Memory Cells- The CIA of the body
• B cells also produce
memory cells that target
specific antigens.
• They store information
about the germ.
• If the germ reappears,
antibodies are
immediately released.
Textbook Activity
• Using a textbook and the word bank at the
bottom of the page, fill in the graphic
organizer and answer the questions.
Whooping Cough
Write down the following questions and answer them after
watching the video.
1. What makes whooping cough different from a
regular cough/cold?
2. Why does it affect infants more?
3. What are two things adults can do to prevent
spreading whooping cough?
Whooping Cough Video
• www.youtube.com/watch?v=3akJVesMdvs
Exit Ticket
Explain in complete sentences how fighting
crime is similar to our immune system
fighting diseases. You should have at least
3 quality sentences in your response.