Wednesday Warm Up 5/251. 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 MacrophagesThe 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.