YR2-CH5&6-LSN6

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

HAVE READY:

• YOUR NOTES
• GOOGLE CLASSROOM
• YOUR HW UPLOADED TO CLASSROOM
• Complete the test review open questions?
• Is everything answered?

NOTES TODAY:

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

What is blood made of?

What are the bloodgroups?

How do they cross?

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 TIME LESSON:

• Kerboodle page 94 - 95
• exercises 1-9