Exam 3 Study Guide - Bio 311C Fall 2007 Study Guide...

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Fall 2007 Study Guide material for Exam 3 up to and including Nov. 12 lecture (complete) Note: I use the word “Define” quite a bit; this also means that you understand the material cited to the extent we covered in lecture. Important Points to Learn about Nutrient Cycles 1. Water and carbon cycles are pretty familiar—know the basics. 2. Phosphorous cycle----also pretty straighforward. Phosphate in soils and water taken up by plants, distributed to animals and then returned to soil, water via decomposition. 3. Nitrogen cycle. Understand how gaseous nitrogen in atmosphere is converted to a form useable by organisms. Understand bacteria modify the nitrogen to NO 2 - and NO 3 - forms and back to gaseous nitrogen or uptake by plants. Important Points to Learn about Cell Communication General Points -Local and long distance communication -Understand 3 processes: reception, transduction, and cellular response -define ligand. -often, the signal is amplified through the transduction pathway. -define secondary messenger G-protein coupled receptor pathways 1. Cellular localization and structure of receptors 2. General description of receptor signal transduction pathway via G proteins and leading to change in activity of target protein. What happens when ligand concentration drops? 3. Ex: Epinephrine signaling pathway as occurs in liver and skeletal muscle to extent we covered in lecture. Why is this an important pathway? Understand the sequence of steps and where they occur in the cell, the components and how regulated both for activation of the pathway and shutting off of the pathway when ligand concentration drops. Tyrosine-kinase receptor pathways 1. Cellular localization and structure of receptors 2. Growth factors as a major group of ligands for this type of receptor in animal cells. 3. General description of receptor signal transduction pathway to modify the activities of multiple signal relay proteins and shutting off of the pathway when ligand concentration drops. Ca
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This note was uploaded on 03/20/2008 for the course BIO 311C taught by Professor Satasivian during the Fall '08 term at University of Texas at Austin.

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Exam 3 Study Guide - Bio 311C Fall 2007 Study Guide...

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