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C2.1 Chemical signalling - student friendly summary

This is a 'student friendly' summary list of the IB DP Biology Guide for Topic C2.1 Chemical signalling Interaction and interdependence — Cells AHL: 4 hours Guiding questions Cells communicate to one another through a complex system of messenger molecules such as hormones, neurotransmitters or ions. These molecules must bind to specific receptor molecules that are found on or in cells in order to bring about the...

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