Assignment5 - 5 Describe the role of plasma-membrane G...

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125:355 Physiological Systems for Biomedical Engineers, Dr. Drzewiecki Fall, 2011 Homework Assignment #5, Due Wednesday, 2/16 /11 Student Name: __________________________________Signature: __________________________________ Handwritten Answers Only 1. What is the chemical nature of receptors? Where are they located (Chapter 5, Review Question #1)? 2. Explain why different types of cells may respond differently to the same chemical messenger (Chapter 5,  Review Question #2). 3. What is the result of opening a membrane ion channel (Chapter 5, Review Question #7)? 1
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   4. Contrast receptors that have intrinsic enzyme activity with those associated with cytoplasmic JAK kinases  (Chapter 5, Review Question #8).
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Unformatted text preview: 5. Describe the role of plasma-membrane G proteins (Chapter 5, Review Question #9). 6. What are the two general mechanisms by which first messengers elicit an increase in cytosolic calcium concentration? What are the sources of the calcium in each mechanism (Chapter 5, Review Question #12)? 7. How does the calcium-calmodulin system function (Chapter 5, Review Question #13)? 2 8. Describe the manner in which activated plasma-membrane receptors influence gene expression (Chapter 5, Review Question #14). 9. Sketch the pathways for eicosanoid synthesis and briefly describe their major functions. 3...
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