Immune system Questions

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What are antigens?
Molecules ( proteins or polysaccharides) on the surface of cells. They identify cells as self or non self.
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What is phagocytosis?
The process of a phagocyte engulfing a pathogen.
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What are the functions of Tcells?
They have proteins that bind to the antigens presented by the phagocytes to be activated. The can then either release substances to activate Bcells or attach to antigens on a pathogen and kill the cell.
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What are the funtions of B cells?
They are covered in antibodies, these bind to an antigen and make an antigen- antibody complex, and each cell has a different antibody.When a complementary antigen binds to the specific antibody it will divide in to plasma cells.
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What are plasma cells?
Plasma cells secrete the specific anitbodies to the antigen on the pathogen.
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Describe the functions of antibodies?( 3marks)
1) coating pathogen to make it easier for phagocyte to engulf it 2) coating pathogen to prevent it from entering host cells 3)binding to and neutralising toxins
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How does the secondary response differ from the primary response?
S. response : no sympotoms and memory cells already in blood to produce plasma cells and quicker P.response : slow, not as many b cells that can bind to it, shows symptoms, it will then create memory cells
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What monomers make up antibodies and how are they linked?
Amino acids, peptide bonds
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What makes the anti bodies specific?
Their variable regions, they are all different due to amino acid sequence
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Card 2

Front

What is phagocytosis?

Back

The process of a phagocyte engulfing a pathogen.

Card 3

Front

What are the functions of Tcells?

Back

Preview of the front of card 3

Card 4

Front

What are the funtions of B cells?

Back

Preview of the front of card 4

Card 5

Front

What are plasma cells?

Back

Preview of the front of card 5
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