The Immune System

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  • Created by: sara.5
  • Created on: 22-04-18 12:45
What happens when pathogen manage to get through physical barriers?
The immune system becomes active, attacking pathogen and trying to prevent harm
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What are antigens?
All cell have molecule on their outer surface called antigen?Cells form different antigen it is used to identify if something is from the body or not
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What do Lymphocytes have on their surface?
Antibodies
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What happens when a lymphocyte has an antibody that matches the shape of the antigens of a pathogen?
It attaches to the pathogen and stops the pathogen working the lymphocyte is activated and will divide rapidly to produce identical lymphocytes with same antibodies
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What do some of these cells release large amounts of?
Identical molecules in the body
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After the antibodies have attached to the matching antigens what happens next?
This may kill the pathogen or cause other parts of the immune system to destroy them
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Why after the pathogen is killed do some of the lymphocytes that have matching antibodies stay in the blood?
So if the pathogen tries to attack infect again memory of lymphocytes cause a much faster secondary response which means you are immune to that pathogen
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How else can immunity to a pathogen be triggered?
Artificially by vaccine
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How doe it do this?
The vaccine contains weakened or inactive pathogen or bits of pathogen that include antigen
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Card 2

Front

What are antigens?

Back

All cell have molecule on their outer surface called antigen?Cells form different antigen it is used to identify if something is from the body or not

Card 3

Front

What do Lymphocytes have on their surface?

Back

Preview of the front of card 3

Card 4

Front

What happens when a lymphocyte has an antibody that matches the shape of the antigens of a pathogen?

Back

Preview of the front of card 4

Card 5

Front

What do some of these cells release large amounts of?

Back

Preview of the front of card 5
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