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:

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

THE HEART SONG:

Watch:

• In which order does the blood flow through the heart?
• When is the heart "filling up with blood"?

In which order does the blood flow through the heart?

1. atrium right; atrium left; down to ventricle
2. down to ventricle; atrium left; atrium right; down to ventricle
3. atrium left; down to ventricle; atrium right; down to ventricle
4. atrium right; down to ventricle; left atrium; down to ventricle

When is the heart filling up with blood?

1. relaxed state (diastole)
2. contract state (systole)
3. never

Blood

What is blood made of?

What are the bloodgroups?

How do they cross?

-> see classroom or make a screenshot

Movie: the immune system

Watch: 

• Where are the leukocytes originated form?
• How long does it take before the immune system reacts?
• Which cells act like PacMan?
• What is the benefit of fever?
• 
  

Where are leukocytes originated from?

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

How long does it take before the immune system reacts after pathogens enter your body?

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

Which cells 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 then
3. you will get thirsty and drink enough to dillute your blood
4. your body is to warm for the pathogen

What is going wrong at people with an auto-immune dissease?

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 TIME LESSON:

• Kerboodle page 94 - 95
• exercises 1-9

institution code = ldu2