Find-your own animation: muscle contraction
For this lecture's animation, search for "crossbridge cycling" or "sliding filament" or "muscle contraction." Be sure to find a new animation, give the URL, and indicate what was good or poor about the animation. I'd love to hear what part became clearer for you compared to the lecture information.
50 comments:
http://youtube.com/watch?v=gJ309LfHQ3M
This video is very useful in illustrating how myosin and actin areinvolved in muscle contraction. I love how the video is 3-dimensional with distinct labeling and coherent narration. One element that became clearer by watching this video was the actual movement of the myofibrils. The video we watched in class did not show them moving, but merely explained how they move.
http://youtube.com/watch?v=gJ309LfHQ3M
This video shows what we learned in class today regarding the process that takes place in muscle contraction. The animation is very simple but does an excellent job of showing how the ATP splits into phosphate and ADP and take turns coming off, allowing the myosin to detach and reattach itself to myosin binding sites. Towards the end it also shows how calcium plays a role in this process of muscle contraction. I also like how it labels the parts before it shows the animation so you know what you're looking at.
http://www.sci.sdsu.edu/movies/actin_myosin.html
Since someone got to the youtube video before me, here is another animation of muscle contraction. I like the other one way better but one good thing about this one is that it allows you to sort of get an idea about how fast this process actually happens. It's incredible! Other than that, you have to think a lot more to follow the process of this video. So, I suggest the video link given above
http://www.brookscole.com/chemistry_d/templates/student_resources/shared_resources/animations/muscles/muscles.html
This animation shows the muscle contraction steps, showing the components of the muscle cells in 3-dimensional. This animation is very helpful learning the basic structure of the muscle fiber, sarcomeres to sarcoplasmic recticulum. Compared to the animation that we watched in class, the animation is very poor. The animation does not really explain about the myosin and actin part of the contraction. It is rather focused on the components of the muscle cell.
http://www.sci.sdsu.edu/movies/actin_myosin.html
http://biology-animations.blogspot.com/2007/12/muscle-contraction-animation.html
The first animation only shows the cross-bridge of myosin and actin. The animation is little bit fast to recognize what is happening.
The second animation is much more detailed and explains well the whole process of muscle contraction including the actin myosin cross-bridge. I learned clearly how the cross-bridge plays a role in muscle contraction.
This video shows a close up of the myosin and actin contracting. It has multiple heads of myosin sliding along the actin, giving a better overall view of what is going on during muscle contraction than the one shown during lecture. The only negative part of the video is that it doesn't provide any sound. You kind of have to know what is going on prior to viewing to really understand it. It does give a clear diagram of the different parts of the muscle by labeling the microfibrils.
http://entochem.tamu.edu/MuscleStrucContractswf/index.html
http://www.blackwellpublishing.com/matthews/myosin.html
This animation is really really good because it comes in a step by step animation clicker option. What I mean is, you just have to click and for each step, it will show you what is happening during the muscle contraction. In the lecture I had trouble understanding what was going on in the contraction. There was so much to digest from the calcium pulling away the rope or whatever was happening, but in this animation I can clearly grasp what is ocurring during each step, when the ACH comes out and what it does.
http://www.youtube.com/watch?v=EdHzKYDxrKc
This video clearly demonstrates the sliding filament theory. It talks about the contraction of the bicep muscle. What is so great about this video is that it goes from the big picture (the entire muscle) to the small picture (the sarcomere). It illustrates in great detail the entire contraction process and the details of how it occurs. This video made the lecture material very understanding and therefore I highly suggest everyone to take a look at this video.
http://www.vetmed.wsu.edu/van308/muscleanimation.htm
This animation is very helpful and does a great job showing the process of muscle contraction. Not only does it show the molecules that are entering and leaving but also physically shows the contraction to help visualize what happens where. Each step has a brief description on what is going on to help the viewer throughout the way. I think this animation is a very useful supplement to the lecture and can help clear any questions regarding muscle contraction.
This video shows a simplistic approach to muscle contraction. The narrator's voice is boring but overall the illustrations were okay. The tape is somewhat long in its explanation but entertaining.
http://www.physioviva.com/movies/muscle_struc-func/index.html
http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter10/animation__action_potentials_and_muscle_contraction.html
This is a really cool animation, similar to the style presented in class. It clearly shows how the action potential initiates, the muscle contaction sequence and how the myosin and actin interact in the mucsle contraction process. Another aspect about this animation that I liked is the little interactive quiz at the bottom, so you can test yourself.
this animation is similar to the one that was shown in class. with the shrinking I band and the disappearing H zone. It also shows how the A band doesn't change and how actin actually doesn't move it is really the myosin that crawls and pushs the actin together. It is a simple diagram but it is helpful in understanding which bands changes size. Was helpful to actually see how fast a muscle contracts.
http://www.3dotstudio.com/zz.html
http://www.edumedia-sciences.com/a502_l2-muscle-contraction-sarcomere.html
This animation shows how the muscle contracts along with the human arm. As we move our arm the muscle contracts slowly within that energy. It is less detailed than the video we saw in class but still we can have greater understanding of the procedure in the muscle contraction. The sacormere is divided into contracted muscle and the relaxed muscle. I found this animation very informative and this animation if from the edumedia, if the animation ends, you have to refresh or go back to the link again in order to see it again.
http://www.wisc-online.com/objects/index_tj.asp?objID=AP2904
This animation clearly demonstrates the whole process of the muscle contraction. It starts off showing how the action potential reaching inside the muscle cells through T-tubules, causing the calcium ions to combine with the troponin of the actin, causing the active sites to expose, allowing the head of the myofilament to bind with the actin and thus contract the muscle.
I really like how each step in the animation has a detailed corresponding description.
The things I don't like about the animation is that its rather plain and it doesn't look interesting to the viewers.
www.brookscole.com/chemistry_d/templates/student_resources/shared_resources/animations/muscles/muscles.html
This animation is about muscle contraction. It shows myofiber and steps of muscle contraction. It is good to learn some vocabs on muscle fibers. But it's not as detail to show 'I band' or 'A band' etc.
http://www.bio.davidson.edu/misc/movies/myosin.mov
This is a very simple cartoon animation of myosin attaching to actin during muscle contraction. Although the pictures are very clear and simply drawn, the video has no words on the screen providing an explanation for the steps occurring and there is no sound either. You would have to already know everything about muscle contraction to even understand the video but if you did you would not even be watching it in the first place. This is not an effective teaching device because of the lack of explanation of the actual contraction.
http://www.sumanasinc.com/webcontent/animations/content/muscle.html
In this animation I liked how they showed different views and close-ups of all the parts involved in muscle contraction. I especially liked the side-view of how the tropomyosin blocks the myosin binding site. I probably would've liked it better if there were words along with the voice, as I like to read what is being said -- like captions.
This animation made it even more clear that Calcium is quickly returned to the sarcoplasmic reticulum by the action of a Calicium pump after muscle contraction.
http://trc.ucdavis.edu/biosci10v/bis10v/week10/08muscularsystem.html
This website has two animation. The first animation simply states the process of the sliding filament theory. But I throughly enjoy the interactive section in which you label the parts of the muscle. The second animation is more complex in that it goes more into detail about ATP effecting the myosin and how the calcium would repeat the process. The only downfall of this video is the haunting and epic music in the background.
http://www.youtube.com/watch?v=H4mFWxaeMQo&feature=related
I found this website to be very informative. It breaks down everything from the beginning by showing you first the muscle and then zooming in to myofibrils and what it is made up of actin filaments and myofibril filaments. Then it continues to breakdown and explain the cross bridges between actin and myosin.
http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter10/animation__myofilament_contraction.html
This animation is a close up of myofilament contraction and it shows the proteins actin and myosin and explains that contraction begins with the head of the myosin molecules bind to actin, while still bound to actin the myosin head flexes pulling the actin filament along with it. It also explains that the myosin head releases from the actin that is powered by ATP and then attaches itself to another actin filament.
Both of these animations helped me to understand muscle contraction or sliding filament. I believe that the animation shown in class was overall the best animation that explained the concept the clearest, but I believe finding these other animations were also useful because it is nice seeing the concept developed in other ways.
http://www.youtube.com/watch?v=InIha7bCTjM&feature=related
The quality of this animation is really good. It shows the contraction and relaxation of the heart muscles. It zooms into the myosin heads binding with actin, and the little circles floating around while actin binding sites are exposed are calciums. The bad thing about this animation, however, is that the video is somewhat short and has no narration. It is a good idea to try to explain the steps shown in the animation, to test your understanding of muscle contraction.
1)
http://bio.winona.edu/berg/ANIMTNS/SlidFila.htm
2)
http://bio.winona.edu/berg/ANIMTNS/muscle.htm
The first animation shows the sliding filament model of muscle contraction. It shows how sacromere shortens and how thin and thick filaments' "positions" changes as the muscle contracts.
The second animation demonstrates mechanism of muscle action at the molecular level (the whole ATP becomes ADP + Pi and how they bind to the binding site on the myosin head).
Both animations are great because they clearly show how the muscle contracts and the descriptions next to the animations describe what really happens during the muscle contraction.
http://www.youtube.com/watch?v=7V-zFVnFkWg
When I researched this topic there was an abundance of information, so I watched a few videos and tried to put all of the information together. The first video I found explains the muscle contraction in a simple way. It is very basic and does not cover the complexities of the muscle contraction. What I like about this video; however, is that it puts all of the steps together, and shows what it looks like when a muscle is contracting, then relaxing, then contracting, then relaxing and so on. In class, we went into more depth on what each job is when a muscle contracts, this video offers a nice alternative in looking at the way the whole picture works.
http://www.youtube.com/watch?v=JOac0YeaK7w&NR=1
Another video I found shows the ways in which the ATP travels in relation to the body. It also shows the way the I band and H zone get smaller. This video does not have sound, but it very interesting because it shows how it relates to the arm muscle. This video is better than the one we watched in class because it shows the process as a whole in relation to actual muscle movement that can be seen.
http://entochem.tamu.edu/MuscleStrucContractswf/index.html
I found this animation very helpful. It containts a lot of information on muscle structure and fuction giving you a break down of what everything is and labeling the parts. It illustrates Sarcomere Structure, Sarcomere - Fibril Contraction, Actin - Myosin Crosslinking, Crosslink Detail, and Crosslink Biochemistry. I loved that fact that everything was well labled and clear to understand, plus, they also have all the steps written out on the right side of the screen. By watching the crosslink biochemistry sequence, I was able to understand that process of ATP turining into ADP and the role of phosphate and how that moves the myosin head over the actin.
This video was very clear in demonstrating the path of the action potential through the sarcolemma and into the T-tubles and showed me exactly when the calcium ions diffuse from the sarcoplasmic reticulum into the sarcoplasm. It also cleared up for me the anatomy of the muscle cell; now I know exactly what is the actin myofilament, tropomyosin, and troponin. The video also made clearer the role of the calcium ions in that they attach and move the tropomyosin, allowing myosin heads to bind to the myosin binding sites and cause muscle contraction.
http://msjensen.cehd.umn.edu/1135/Links/Animations/Flash/0010-swf_action_potenti.swf
This video was very clear in demonstrating the path of the action potential through the sarcolemma and into the T-tubles and showed me exactly when the calcium ions diffuse from the sarcoplasmic reticulum into the sarcoplasm. It also cleared up for me the anatomy of the muscle cell; now I know exactly what is the actin myofilament, tropomyosin, and troponin. The video also made clearer the role of the calcium ions in that they attach and move the tropomyosin, allowing myosin heads to bind to the myosin binding sites and cause muscle contraction.
http://msjensen.cehd.umn.edu/1135/Links/Animations/Flash/0010-swf_action_potenti.swf
http://bioisolutions.blogspot.com/2008/02/muscle-contraction.html
This animation is helpful for people who don't quite get the process of the crossbridge cycle. Its focus is away from the big picture, the sarcomere, and focuses mainly on the crossbridge cycle. It's different from what we saw during lecture because animation in lecture was on the sarcomere, showing the changes in length during muscle contraction. In this animation, the actin and myosin binding process is zoomed in, which makes it helpful for the audience to distinguish each figure.
http://health.howstuffworks.com/muscle2.htm
This animation is good in that it is a step by step animation on the bridge cycle but I didn't like that the animation on the neurotransmitters is not too clear.
One thing that became clearer to me is that first animation on the 2D and 3D sacromeres, because I was getting a little confused on where the bands are, it gives me a clearer view on how the 2D picture fits on the 3D.
http://www.dnatube.com/view_video2.php?viewkey=c3348ad1b35d7231ee2b&page=1&viewtype=&category=&featuredesc=
In this video, although there is no sound, you can clearly see how everything works. The video relates the muscle contraction to the heart, which is fun. It shows quite well how the myosin and actin moves and contract. When there is no calcium, the myosin stops and actin is pulled back to normal again. It zooms up again to show that calcium lands on the troponin complex which then removes the tropomyosin out of the way so the head of the myosin can attach to the binding sites. However it was not clear on how the myosin moved after the binding site was open. It didn't show there was ATP involved. Other than that, it is a great video on demonstrating how when there is calcium to attach to the troponin complex, it moves the tropomyosin; and when there is no calcium, the myosin is not attached anymore and actin springs back to normal.
http://www.mhhe.com/biosci/esp/2002_general/Esp/folder_structure/su/m4/s11/sum4s11_10.htm
I enjoyed this one because it shows everything that is going on at the same time instead of focusing on one particular part of the sliding filament. It helps to make clear how everything flows together and happens continuously in a fluid motion.
http://www.blackwellpublishing.com/matthews/myosin.html
For the most part, this animation was very well done. It explains how ACH is released from the motor neuron and how it depolarizes the muscle cell. The AP then travels down the t-tubule and triggers a calcium release within the sarcoplasmic reticulum. On the next slide, it showed the cross-bridge of myosin and actin. It even explained that in the event that calcium decreases, troponin locks tropomyosin in a blocking position, allowing the thin filament to slide back in place.
I felt this slide was right on target with class. Although it was more of a slide than an animation, it really helped me understand muscle contraction as a whole.
http://www.youtube.com/watch?v=Vlchs4omFDM&feature=related
This video demonstrates how muscles contract because of the sliding filaments. It has a detailed illustration of the crossbridge cycle and has a broad view of how the muscle simultaneously shortens//contracts. Then the video zooms into an indivudual myosin head and shows the process in greater detail.
http://www.youtube.com/watch?v=MoyQjFncPQw
This animationi is a bit long, but I like it because it is a review of everything we have gone over in class on muscles and muscle contraction. At the end of the video students act out the crossbridge cycle, but I thought the one we did in class was much more clear.
This creative video illustrates how the release of acetylcholine causes the channel to open, allowing calcium to go through. The calcium attaches to troponin which uncovers the myosin binding sites. This then allows the myosin to move the actin filament. This video emphasized calcium's role in the process, providing a clear understanding of how myosin binding sites become ready for attachment.
http://www.youtube.com/watch?v=TyWSEqpEuAk&eurl=http://video.google.com/videosearch?client=safari&rls=en-us&q=sliding+filament&ie=UTF-8&oe=UTF-8&um=fmt=18
http://www.wiley.com/college/pratt/0471393878/student/animations/actin_myosin/actin_myosin.swf
I think this animation was great. Not only did it do a very detailed job at explaining every component used to create a muscle contraction, but it also doesn't stop there. It continues to explain everything else you need to know about muscles and their parts. Its made up of 10 different sections which you can cycle through yourself to see just what you want. I enjoyed the muscle contraction section because it does a great job of showing exactly how the myosin tails grab the actin in a muscle contraction.
http://www.vetmed.wsu.edu/van308/muscleanimation.htm
This site isn't the clearest in going through all the steps in the muscle contraction process, but it really gave me a good idea of how the muscle contracts all at once. In other animations, the process is slowed down, and sometimes even stops in the middle. Here, the contraction is shown in one cohesive movement; more like what is happening if you were watching a muscle in real time.
I found a muscle contraction animation that does a great job of illustrating the interaction of myosin crossbridges with actin. It is a very descriptive animation that adds color and 3-dimensional figures to emphasize clearly what is going on. I didn't find any flaws with the video since everything was vividly labeled, and the voice-over explanation was totally understandable. With the help of this animation, I became more knowledgeable about how most crossbridges are prepared to interact with actin after the tropomyosin troponin complex is moved away from myosin binding sites on actin by calcium ions. Now I am much more familiar with the roles of the myofibrils, myosin binding sites, and ATP and its breaking up into ADP and inorganic phosphate. I recommend this animation because it is very clear and rich with information.
http://www.killmeimamedstudent.com/?p=57
http://www.sci.sdsu.edu/movies/actin_myosin_gif.html
This animation demonstrates the actin myosin cross bridge cycling. There is a key that labels each part of the animation, but it does not give you the control to slow down the video to get a better look, and there is no explanation of what is happening or what is causing the events to occur. This animation is only good if you have a rough understanding of the cross bridge cycle, and simply need to see it visually played out.
http://trc.ucdavis.edu/biosci10v/bis10v/media/ch21/sliding_filament_v2.html
This animation is focused on how the myosins bind to the actins during muscle contraction. I love how there are captions for this animation to allow me to follow each step better. The best thing about this animation is the practice section that it contains. In the middle of the animation, it pauses and lets the viewer participate in a labeling activity. It is helpful to be able to get involve in it. However, this video lacks fluid motion and is not as creative and clear as the video that we watched in class.
http://www.lionden.com/muscle_animations.htm
This animation is pretty useful. It explains the entire muscle contraction. It has a Cross-bridge model, a sliding filament model, and a power stroke model. All the animations are extremely well written, the only thing that is bad is that they are a little slow.
This animation briefly shows muscle contraction. It has four steps that how myosin and actin interact to move the muscle. This website also has tropomyosin contraction animation. But this video does not have narration or 3D animation.
Website: http://www.nottingham.ac.uk/biochemcourses/chimestudents/mspragg/cell/musc.html
http://www.nottingham.ac.uk/biochemcourses/chimestudents/mspragg/cell/musc.html
(link at bottom under "muscle contraction"- CLICK!)
This animation is very basic I must say. The strong points about this animation is that the picture is clear, and that everything is labeled: the myosin, actin, myosin head, ATP, ADP+P, troponin,etc. The bad part about this animation is that it is so low tech. There is no sound, no explanation, and the thing goes WAY too fast.
From a student point of view, these are the things that would make for an effective video for muscle contraction for us to easily understand:
1. Slowly played
2. Everything labeled
3. Process explained by voice
The things that confused me the most was matching the actions of what happens when ATP splits up, when P seperates and when ADP slits off. Everything happens all practically at the same time, so mapping the steps was very confusing.
This link shows not only the muscle contraction but also action potential, contration cycle, how multiple myosin heads shorten sarcomeres, and muscle relaxation. There are also explanations provided with animation pictures. This link helped me understand better and add more details.
http://www.getbodysmart.com/ap/muscletissue/contraction/contractioncycle/tutorial.html
http://www.vetmed.wsu.edu/van308/muscleanimation.htm
this was a pretty good animation, however I liked the one in class better because it showed how the action potential propagated down the t-tubule to release calcium ions, which then bound to the troponin, to pull the tropomyosin off the myosin binding sites, followed by muscle contraction. This animation, shows how the calcium ions come in, but it doesn't show where they come in from. It shows the calcium ions binding to the troponin, and the myosin binding sites begin exposed so that myosin heads could bind to actin to begin cross-bridge cycling.
I went to the website http://www.brookscole.com/chemistry_d/templates/student_resources/shared_resources/animations/muscles/muscles.html and was amazed at how well this site showed me exactly what I did not yet learn. I thought I had a good grasp on the information, however this website had three different quizes about the components of the muscle and muscle fibers and it allowed me to see that I needed to study the structure more clearly. After the three quizes and tutorial were read and passed I was able to view the animation. I really liked this method because it was a great review and showed me what I did not grasp from the lecture.
http://www.truveo.com/Muscle-Contraction-Actin-and-Myosin/id/1663291597
I did not find this video to be nearly as helpful as the video in class. It did, however, give a new perspective for muscle contraction by using a rabbit muscle rather than a drawing of a muscle.
This video did prove to me that ATP is necessary for the contraction of the muscle cells and I did not quite understand ATP before. I just knew that it is Phosphate and ADP.
I also found it interesting to see actin and myosin up close, rather than a drawing of it. I now have a much better perspective at what actin and myosin actually look like.
http://youtube.com/watch?v=Ap3fzhwSfq0
This animation is very helpful. Although the animation is not very professional, it gives very useful information. I learned that atp attatches to myosin which meakes the head deatatch off.
http://youtube.com/watch?v=s4RMAsW4RSQ
Just like my last comment, I enjoy watching humans lecture the mechanics of the human body. I found this clip on youtube and have enjoyed the creativeness and knowledge this masterpiece evokes. All the steps of muscle contraction is shown in a very step-by-step manner and has made clear from the beginning of the muscle contraction to the end. The music accompanies the excitement of muscle contraction very well. All the steps of muscle contract I learned in class is now clearer is all aspects.
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