lecture 7_notes

lecture 7_notes - Lecture 7 SPECIAL NOTICE See instructions...

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Lecture 7 SPECIAL NOTICE See instructions for this Friday exam on Smartsite! Note that you are assigned a specific room for the exam. If you come to the wrong room, you will not be able to take your exam there. Membranes, continued Osmosis continued Hypertonic Isotonic Hypotonic Aided diffusion Channel and carrier proteins Gated channel (triggered by signal) Specificity, differences Active transport (against gradient) Needs energy: active transport Primary: uses ATP as energy currency What is ATP? Adenosine triphosphate. Two high energy bonds Transporter example: Na-K pump. 1 ATP -> P + ADP: net effect the protein is "charged en- ergetically". Then 3 Na+ || -> 3 Na+ out, and then two K+ move in. Secondary: uses a gradient for cotransport. Scheme: pump Na+ against gradient using ATP. Then use Na+ gradient to drive import of other molecules (glucose importer) Links http://www.youtube.com/watch?v=iA-Gdkje6pg http://feig.bch.msu.edu/images/gA.mpg
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lecture 7_notes - Lecture 7 SPECIAL NOTICE See instructions...

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