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Cellular_Communication_f08

Cellular_Communication_f08 - Cellular Communication How do...

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Cellular Communication How do cells receive and respond to environmental signals? What signals do cells send to each other? What common themes and methods are shared in cell signaling throughout the tree of life?
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Genes for cell signaling in eukaryotes
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To what types of signals do cells respond? Abiotic Biotic
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Cell-cell communication in prokaryotes: quorum-sensing in Vibrio harveyi AI-1 and AI-2 : autoinducer compounds LuxP/LuxQ and LuxN : membrane receptors for AI compounds, sensor kinases/ phosphatases LuxR : transcriptional activator
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Q: This figure shows signaling by what type of molecule? A. Steroid hormones B. Neurotransmitters C. Peptide hormones D. Cyclic AMP E. Ion-channel receptors
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Receptors – how cells perceive signals Q: Which of the following does not have a specific receptor? A. Light B. Steroid hormones C. Ethylene D. Geomagnetic field E. Salt
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Yeast shmoozing
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G-protein coupled receptors: found in animals and fungi
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Cyclic AMP as a second messenger
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