B5 U3 2HVTTO

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

The immune system

• Take off your jacket
• Put your things on your desk

       Book, notebook, pencil case

• Bag on the floor
  
• Read pages 211-215

Lessongoals

• You can describe how antibodies protect against infection
• You can describe how immunity is created
• You can describe what happens in the case of an allergic reaction

Wheel of homework

Go to Lessonup.app and use this code

Reward

Penalty

What is natural immunity

1. Lungs
2. Heart
3. Intestines
4. All organs

Where in the body does O2 go INTO the blood?

1. Lungs
2. Heart
3. Intestines
4. All organs

Where in the body do nutrients go INTO the blood?

1. Lungs
2. Heart
3. Intestines
4. All organs

Where in the body does water go INTO the blood?

1. Longen
2. Hart
3. Darmen
4. Bij alle organen

Where in the body is O2 RELEASED from the blood?

1. Lungs
2. Heart
3. Intestines
4. All organs

What part of the blood is involved in killing pathogens?

1. White blood cells
2. Red blood cells
3. Platelets
4. Blood plasma

Foreign bodies

Substances that do not belong in our body : exogenous/foreign bodies

• Poisons
• Pathogens: bacteria, viruses, parasites
• Blood/organs from a donor

Antigens

Cells, bacteria en viruses are covered with antigens.

Antigens = proteins on the outside of a cell

Cells can recognize each other using antigens.

If your body detects antigens from foreign bodies it will start an immune reaction

Immune reaction

Pathogens entering your body = Infection

White blood cells will fight the pathogens:

• Encapsulating (= eating) them 
• Making antibodies

Antibodies

• White blood cells make antibodies
• Antibodies fit (like puzzle pieces) on antigens
• Each antigen has its own antibody
• Pathogens covered in antibodies are helpless, they die or are eaten by white blood cells.

Antibodies doing their job

Immunity

Immune = body 'knows' pathogen, It is quickly killed. You don't get ill.

Natural

Pathogen enters your body.

Body 'learns' how to make antibodies

Artificial

Using a vaccine containg a dead/weakened pathogen

Body safely 'learns' how to make antibodies

How much use would a vaccine against .... have
Flu

1. It's impossible to make this vaccine
2. The vaccine would have no effect
3. You become immune for a time
4. You become immune for always

How much use would a vaccine against .... have
Autism

1. It's impossible to make this vaccine
2. The vaccine would have no effect
3. You become immune for a time
4. You become immune for always

How much use would a vaccine against .... have
Polio (paralysis)

1. It's impossible to make this vaccine
2. The vaccine would have no effect
3. You become immune for a time
4. You become immune for always

How much use would a vaccine against .... have
chickenpox (=waterpokken)

1. It's impossible to make this vaccine
2. The vaccine would have no effect
3. You become immune for a time
4. You become immune for always

Everyone must vaccinate their kids

Strongly disagree

Disagree

Agree

Strongly agree

What you should do:

• Read pages  211-214
• Do asgmt  1-9, 5c pgs. 215-217

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zs = Working in Silence

• No asking questions
• Silent, don't disturb anyone
  
• Stay at your  desk

What you should do:

• Read pages 211-214
  
• Do asgmt 1-9, 5c pgs. 215-217

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zw = Working with whispering

• Teacher is available for questions
• Only whisper with the student next to you
• Stay at your  desk

Tidy Duty

Today these people are on tidy duty

• Desks: empty and straight
• Chairs:  underneath the desks
• Floor: no rubbish