EDUCATION: Muscle Workout

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Science  24 Jan 2003:
Vol. 299, Issue 5606, pp. 485
DOI: 10.1126/science.299.5606.485a

Students can bulk up their knowledge of muscle structure and function with this tutorial from the Muscle Physiology Lab at the University of California, San Diego. Whether we're grasping a pin or hefting a sack of potatoes, muscle contraction involves the same molecular events. The 23 chapters start by explaining the interaction between the overlapping proteins myosin and actin, which slide across one another to produce contraction. From there, students can explore topics such as muscle metabolism, how nerve signals spark contraction, and the physics of joint movement. The site also links to animations that show how the liaison between muscle proteins leads to movement.

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