Sarcomeres: Difference between revisions
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A sarcomere is a repeating unit within the [[Myofibril|myofibril]] of skeletal muscle cells. The sarcomere is split into the H-zone, A-band, I-band, M line and Z line. The H-zone consists of [[Myosin|myosin]] only, the I-band consists of [[Actin|actin]] only and the A-band contains both [[Actin|actin]] and [[Myosin|myosin]]. The M-line holds together the thick myosin filaments. The Z-line differentiates between each sarcomere. During the [[Muscle contraction|contraction]] of skeletal muscle cells the A-band stays the same length whereas the H-zone and I-band decrease in length. The distance between the Z-lines also decreases. <ref>Wilson. H, Hunt. T (2008) Molecular Biology Of The Cell, 5th edition, New York: Garland Science.</ref> | [[Image:S.gif|left|S.gif]] A sarcomere is a repeating unit within the [[Myofibril|myofibril]] of skeletal muscle cells. The sarcomere is split into the H-zone, A-band, I-band, M line and Z line. The H-zone consists of [[Myosin|myosin]] only, the I-band consists of [[Actin|actin]] only and the A-band contains both [[Actin|actin]] and [[Myosin|myosin]]. The M-line holds together the thick myosin filaments. The Z-line differentiates between each sarcomere. During the [[Muscle contraction|contraction]] of skeletal muscle cells the A-band stays the same length whereas the H-zone and I-band decrease in length. The distance between the Z-lines also decreases. <ref>Wilson. H, Hunt. T (2008) Molecular Biology Of The Cell, 5th edition, New York: Garland Science.</ref><ref>Sarcomere picture http://en.wikipedia.org/wiki/Sarcomere August 12, 2014.</ref> | ||
<ref>Sarcomere picture http://en.wikipedia.org/wiki/Sarcomere August 12, 2014.</ref> | |||
=== References === | === References === | ||
<references /> | <references /> | ||
Revision as of 06:50, 26 November 2014
A sarcomere is a repeating unit within the myofibril of skeletal muscle cells. The sarcomere is split into the H-zone, A-band, I-band, M line and Z line. The H-zone consists of myosin only, the I-band consists of actin only and the A-band contains both actin and myosin. The M-line holds together the thick myosin filaments. The Z-line differentiates between each sarcomere. During the contraction of skeletal muscle cells the A-band stays the same length whereas the H-zone and I-band decrease in length. The distance between the Z-lines also decreases. [1][2]
References
- ↑ Wilson. H, Hunt. T (2008) Molecular Biology Of The Cell, 5th edition, New York: Garland Science.
- ↑ Sarcomere picture http://en.wikipedia.org/wiki/Sarcomere August 12, 2014.