Outline 19 2008 Multicellularity - Cell signaling

Outline 19 2008 Multicellularity - Cell signaling - Lecture...

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Lecture 19: MULTICELLULARITY: CELL SIGNALING Summary. With the evolution of multicellular organisms, different cells within the organism need to be able to communicate with and in some cases control cells in other parts of the body. Since much of the communication is chemical, cells have evolved an elaborate series of membrane-bound chemosensors to respond to chemical signals. Some of these chemical receptors were present in single celled organisms that responded to communication signals from other cells, or to environmental conditions. The mechanisms by which cells respond to conditions and signals in their environment are varied, but often begin with a receptor molecule that binds to the stimulus or is affected by it, a signal transduction mechanism, usually a cascade of chemical reactions that amplify the signal, and the generation of a response, which could be a change in cytoplasmic activity, or a change in gene expression. Reading Assignment
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This note was uploaded on 09/13/2009 for the course BIO 1110 taught by Professor Randywayne during the Fall '09 term at Cornell University (Engineering School).

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Outline 19 2008 Multicellularity - Cell signaling - Lecture...

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