Summary
This video looks at the many parts of the inside of a cell. It starts with a cell moving along the edge of a vein or artery. It rolls along the wall via structures on the outside of the cell that cling and uncling to the other cells. Then it shows the many features on the outside of the plasma membrane, and demonstrates cell-to-cell recognition. The video enters the cell, and protein chains (probably microfilaments) form and are severed. Microtubules form and break down, and then vesicles and mitochondria move along them. There is a centrosome containing centrioles, and ribosomes are shown making proteins. A vacuole combines with a lysosome, and then a ribosome makes a protein and injects it into the rough endoplasmic reticulum. The outside of the smooth endoplasmic reticulum is shown, and later the Golgi apparatus receives and "ships" packages. Near the end there is a recap of the video. Finally, the cell from the beginning flattens and slips under a skin cell.
Relevance to Class
In class, we learned about the organelles inside of cells and how they function. We have learned about the plasma membrane, the different types of proteins in the membrane, proteins (last unit), microfilaments and microtubules, vesicles, centrosomes, and ribosomes. We also learned about lysosomes, ribosomes, how they combine to break down food, the rough and smooth endoplasmic reticulum, and the Golgi apparatus. If you watch the video and ignore the labels of each cellular structure, you should be able to identify all the structures we have learned of.
Video Info
URL: http://www.youtube.com/watch?v=B_zD3NxSsD8&feature=related
Publisher of Video: Nicknamercho
Date of Publication: 3/8/12
This video was originally made by Harvard University, but their version included a monotone voice that explained many things we haven't learned yet, so I chose the regurgitated one with music. The original version can be found here: http://www.youtube.com/watch?v=GigxU1UXZXo&feature=related
Hi Ben, this is my question for you:
ReplyDeleteIn 6:45 in the video, is that a protein attached to the phospholipid bilayer? If so, what kind of protein is it?
Yes, it is. It's also shown at 1:42. If you watch the original video with the voiceover (http://www.youtube.com/watch?v=GigxU1UXZXo&feature=related), the speaker says that it traverses the membrane. However, the protein never goes through a reaction with any molecule or cellular structure, and the speaker doesn't say what kind of protein it is. There is no way to know if it is an enzyme, a transporter protein, a protein used for cell-to-cell recognition, or a protein used for cell signaling.
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ReplyDeleteHey Ben. Cool video!
ReplyDeleteWhat are the actin filaments (2:30) and why are they important?
Actin filaments are a kind of microfilaments made of actin. Actin is the most common protein used to form microfilaments. Actin filaments criss-cross to form the 3D grid-like structures you saw in the video. The grid helps to determine the cell's shape and to provide mechanical support. They allow the membrane to move around, so the cell can move, go through endocytosis and exocytosis, and divide. They are most commonly found inside the cell.
DeleteOh, and I found this information at this website: http://www.ncbi.nlm.nih.gov/books/NBK9908/
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