Communication Between cells As Biology OCR Unit 2

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  • Created by: Alex
  • Created on: 23-05-11 11:42

Cell Signalling: The communication between cells that allows effective coordination of a response
Communication achieved through cell-surface molecules - release of hormone like chemicals called cytokines
To detect a signal target cell must have a cell surface receptor
B & T lymphocytes have receptors that are complementary in the shape to the foreign antigen
Antigen may be an isolated protein or attatched to a pathogen ot on surface of a host cell
When antigen detected lymphocyte is activated or simulated
Chemical signals also detected by their target cells using cell surface receptors

What sort of information is commmunicated
Pathogen carries antigens on cell surface
These are detected by our body cells

Sending Distress signals:
when body infected by pathogen in infected it's usually damaged in some way
Internal cell organelles…


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