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Chapter 5 Blog:  Membrane Structure, Synthesis, and Transport (Kimberley)

Page history last edited by KimberleyHausheer 13 years, 8 months ago

In the first section of this page, you will write a daily summary of that day's class.  For example in  your chapter 2 blog, your first entry should be titled 9/3/10.  You should then write a one or two paragraph summary of that day's lecture, outlining the major points.  In the second section, you are required to add two items (link to a website, video, animation, student-created slide show, student-created PowerPoint presentation) and one journal article pertaining to a topic in this chapter.  A one-paragraph summary must accompany each item describing the main idea and how it applies to the lecture topic.  Please see the PBWorks help guide for assistance embedding video and other items directly in the page.  I will also produce a how-to video on using tables to wrap text around items and other useful tips.  Please see the syllabus for organization and grading details.


A.  Daily Blog

9/29/10- On Wednesday we focused on the structure of the plasma membrane. We learned that phospholipids are synthesized in the Er and then transported to the golgi apparatus and then to the cell membrane. This process is called exocytosis. The membrane stays generally the same size by a process called endocytosis which removes phospholipids. We went over trans membrane proteins and how the R groups rearrange themselves. Although previously we learned that proteins fold so that the hydrophobic R groups are hidden in the center, when it comes to trans membrane proteins it is the opposite. This is because instead of being in water they are in a non-polar organic solvent. We also reviewed amino acids because by looking at a primary structure you can predict if a protein is a trans protein or not. Then we went over how surface proteins are synthesized in the cell.


10/1/10 Although I missed the better half of the class due to a tractor trailer accident on 78 I got a review from fellow classmates at lunch and caught the end of the lecture. The  laws of thermodynamics were reviewed. There are two laws. 1. Energy can not be created or destroyed 2. With every energy transfer disorder in the universe increases. Energy has always been a bit of a difficult topic for me because it can not at all be physically seen, it can only be represented in things like a stretched rubber band. The second law of thermodynamics logically makes sense. However when in general it seems so broad and general. The sodium-potassium pump was also reviewed. A video was shown of how it works. It breaks down ATP and uses a phosphate from the ATP to move sodium and potassium ions against the gradient from areas of low concentration to areas of high concentration.


B.  Useful Materials


http://www.johnkyrk.com/cellmembrane.html <-- This  website is a great resource for chapter . I originally found it when I was looking for animations about the cell membrane. It provides information set up similiar to powerpoint slides except with more pictures that move. I discovered that it has presentations for all different cell processes. The cell membrane presentation talks about shingolipids which I don't think we need to know about but was interesting nonetheless. At the end of the presentation it even touches on endocytosis briefly. I think it is similiar to the virtual lectures except with no sound, shorter, and with more animation.


phosphoinositide 3-kinase and regulates membrane fission of Golgi carriers for selective cytokine secretion -PI3K is a lipid kinase that plays a role in signal transduction. In this experiment the scientists are trying to find out the function of P110 and how it relates to P!3K.


Comments (1)

Derek Weber said

at 3:20 am on Nov 23, 2010

Missing one more item in section B.

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