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Chapter 4 Blog: General Features of Cells (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

9/22/10 Today we talked about cells,which is probably one of my favorite subjects to learn about in science because I already have a strong basis of them as a result of learning about them almost every year.


The class started by identifying the differences between prokaryotic cells and eukaryotic cells. Prokaryotes are much simpler. They are smaller, do not have a nucleus, and do not have any membrane bound organelles. There are two categories of bacteria and archea. Bacteria is much more common though, and contrary to what many people think are mostly harmless. Archea are less common and found in extreme environments. Eukaryotic cells are much more complex.They have a nucleus and membrane bound organelles. In class we went over three things that are common between the two cells. Ribosomes, that are in charge of protein synthesis. Cytoplasm, which is where many of the chemical reactions take place. It also allows proteins and carbs to dissolve within the cell. It also helps to maintain the concentration gradient. Another common structure is the plasma membrane which helps regulate what goes in and out of the cell. Eukaryotic cells all look different because they all have different functions. For example a muscular cell would have a lot of mitochondria.

Finally, we learned about the endomembrane system that keeps everything out of the cytoplasm by enclosing it in membranes. It shuttles cargo around the cell.


9/24/10 Today in the beginning of class we found out that we might get to use ipod touches in class. This was extremely exciting and was a great way to start off not only the class but the day. They would be a great tool to have during lecture and lab.

    The main topic of lecture on Friday was protein trafficking. Proteins are essential to cells. Cells behave the way they do and end up where they are because of proteins. There are three types of protein trafficking. 1) RER-co-translational modification,   2) cytoplasmic ( synthesized by free ribosomes) and  3)semi-autonomous- post translational. We went over each type more in detail. We also disccussed how if their is an error in protein trafficking, for example their is no start point, it could lead to disease.


B.  Useful Materials


Niemann-Pick type C disease: importance of N-glycosylation sites for function and cellular location of the NPC2 protein is an article that explains how Niemann-Pick disease type C (NPC), a neurovisceral disorder characterized by accumulation of cholesterol and glycolipids in the lysosomal/late endosomal system, is due to mutations on either the NPC1 or the NPC2 genes. Although its is known that NPC1 and 2 are essential is protein trafficking, what part of the process they help in is unknown. Through a series of test they are trying to find out what exactly is wrong and how to fix it.


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This video describes the process of protein trafficking. It is done by the same program as the cell tour in the Chapter 4 Chapter materials. Although the 3-D animation makes things a little confusing for me, with all the see through things, and the camera angles, there is a lot of good information in the narration.This video focuses mainly on the golgi apparatus and it's function in packaging the proteins. It goes into a lot more detail about how the golgi works than the textbook does.


This video is more for entertainment then for learning. It is a song about the different organelles in the cell and their function. It is a little hard to hear what they are saying so you have to listen closely.

Comments (1)

Derek Weber said

at 3:19 am on Nov 23, 2010

Missing video.

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