Search results
Results from the WOW.Com Content Network
H-band is the zone of the thick filaments that has no actin. Within the H-zone is a thin M-line (from the German "mittel" meaning middle), appears in the middle of the sarcomere formed of cross-connecting elements of the cytoskeleton. Molecular model of the Sarcomere in the A-band. Organization of the central region of the A-band (C-zone).
A diagram of the structure of a myofibril (consisting of many myofilaments in parallel, and sarcomeres in series) Sliding filament model of muscle contraction The myosin heads form cross bridges with the actin myofilaments; this is where they carry out a 'rowing' action along the actin.
the backbone of a muscle fibre is actin filaments which extend from the Z line up to one end of the H zone, where they are attached to an elastic component which they named "S filament"; myosin filaments extend from one end of the A band through the H zone up to the other end of the A band;
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
Sarcomere diagram2.svg; Sarcomere es.svg; ... changed H band to H zone, so it is lesser confusing. 09:18, 19 June 2007: 1,350 × 1,044 (347 KB) Nainscription~commonswiki
The protein complex composed of actin and myosin, contractile proteins, is sometimes referred to as actomyosin.In striated skeletal and cardiac muscle, the actin and myosin filaments each have a specific and constant length in the order of a few micrometers, far less than the length of the elongated muscle cell (up to several centimeters in some skeletal muscle cells). [5]
Sarcomere and M-band structure. [3] (a) electron micrograph of mouse heart muscle sarcomere. (b) diagram of sarcomere layout from (a). Myosin thick filaments are blue, thin actin filaments are orange, Z-discs are black, and the M-band is grey/white. (c) schematic of M-band composition of M-lines.
The calcium drives the movement of myosin and actin filaments. The sarcomere then shortens which causes the muscle to contract. [3] In the skeletal muscles connected to tendons that pull on bones, the mysia fuses to the periosteum that coats the bone. Contraction of the muscle will transfer to the mysia, then the tendon and the periosteum ...