Bios41_Lecture23_03212008

Bios41_Lecture23_03212008 - Chapter 16: Cell Communication...

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Chapter 16: Cell Communication Lecture 23 (pages 533-544) March 21, 2008 Jennifer Venditti
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Cell communication is critical! “Individual cells need to sense and respond to their environment.” “In multicellular organisms…. .cells must interpret the multitude of signals they receive from other cells to help coordinate their behaviors.” “During animal development….cells in the embryo exchange signals to determine which specialized role each cell will adopt, what position it will occupy in the animal, and whether it will survive, divide, or die” Alberts, et al. Essential Cell Biology, 2 nd ed.
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Communication is the conversion of an information signal from one form into another.
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Concept: Cell Signaling Signaling Cell Signal Target Cell Signal Transduction 1. Release of signal 2. Signal binds receptor 3. Signal Transduction begins Change in Cell Behavior
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Communication occurs through different mechanisms over different ranges.
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Endocrine Communication • signal “broadcast” throughout entire body • signal molecule hormone • LONG DISTANCE SIGNAL
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Bios41_Lecture23_03212008 - Chapter 16: Cell Communication...

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