The immune system

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2

HAVE READY:

NOTES TODAY:

• WHAT IS BLOOD MADE up OF?
• WHAT IS THE IMMUNE SYSTEM?
• HOW DOES THIS WORK?

Blood

What is blood made of?

Movie: the immune system

answer the following questions: 

• Where do the leukocytes originate from?
• How long does it take before the immune system reacts?
• What is the name of the cells that act like PacMan?
• What is a benefit of fever?

Where do the leukocytes originate from?

1. red blood cells
2. bone marrow
3. brain
4. thymus

How long does it take before the immune system reacts?

1. millions of years
2. days
3. 2 weeks
4. minutes

What is the name of the cells that act like PacMan?

1. red blood cells
2. T-cells
3. phagocytes
4. platelets

What is a benfit of fever?

1. you will feel sick and are going to rest
2. your immune systems works better
3. you will get thirsty and drink enough to dillute your blood
4. your body is too warm for the pathogen

Why are people that have an auto-immune disease ill?

1. their immune system attacks their own cells
2. red blood cells do not work
3. they have always a fever
4. their immune system does not recognize pathogens

Antigens:

• Antigens are like the passport of a cell. This how your body knows if a cell does or does not belong in your body.
  
• Antigens are proteins that sit on the cell wall/cell membrane of all cells in nature.

Antibodies:

• Your cells produce these to fit the antigens and so attack the pathogens. These are produced by the B-cells.
• stick to antigens
• make pathogens stick together
• stop reproduction 
• work as a gps

Phagocytes:

• The stupid soldiers
• They attack anything with foreign antigens.
• The also attack anything with antibodies attached
• They can track antibodies.

Lymphocytes:

• B-cells
  

     - stick the antibodies together

     - produce the antibodies

     - make memory cells

• T-Helper cells
  

     - identify enemies

     - activate B-cells

• T- Killers cells
  

    - if need be produce toxins to kill the pathogens the phagocytes can't kill

    - produce toxins to neutralise those of the pathogens

HW FOR NEXT LESSON:

• read immunity, vaccination and allergic reaction
• exercises 1-11