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| Sarcomere Contraction | |||||||||||||||
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| On the microscopic level, the muscle contraction occurs through a smaller contraction of the sarcomere. The sarcomere is a functional unit composed of two membranes (Z-lines), which act as boundaries. The Z-lines are attachment points of actin filaments, while the M-band/line is where the myosin filaments attach. The muscle contraction is a result of the actin and myosin filaments sliding over each other, thereby causing the length of the sarcomere to shorten. | |||||||||||||||
| Contraction of a Sarcomere | |||||||||||||||
| Sarcomere Contractions and Other Helpful Links | |||||||||||||||
| Sarcomere Diagram | |||||||||||||||
| Sarcomere Contraction Animation | |||||||||||||||
| Physics 24 w/ Duane Deardorff | |||||||||||||||
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