Myofibrils: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
A myofibril is the single unit of a [[Muscle|muscle]]. They form [[Muscle fibres|muscle fibres]] and contain different regions which some are effected during muscle contraction and relaxation. They are made up of 3 main long proteins; [[Actin|actin]], [[Myosin|myosin]] and [[Titin|titin]]. The previous mentioned proteins are ordered into thin or thick repeating filaments. | A myofibril is the single unit of a [[Muscle|muscle]]. They form [[Muscle fibres|muscle fibres]] and contain different regions which some are effected during muscle contraction and relaxation. They are made up of 3 main long proteins; [[Actin|actin]], [[Myosin|myosin]] and [[Titin|titin]]. The previous mentioned proteins are ordered into thin or thick repeating filaments.<br> | ||
<br> | Myofibrils are the basis of contraction in skeletal muscle cells. They are cylindrical in shape and are 1-2μm<ref>Stevens. A, Lowe.J, (1992) Histology, London, Gower Medical Publishing, Pg 58</ref> in diameter. The thick and thin filaments overlap each other and are made from different proteins. The thick filaments are made from myosin and the thin are made from actin. Each muscle fibre has many myofirbrils running through them. [[Skeletal muscle|Skeletal muscle]] cells are often described as striated this is due to the repeating units of thick and thin filaments<ref>Stevens. A, Lowe.J, (1992) Histology, London, Gower Medical Publishing, Pg 58</ref>. Between each myofibrils there are several [[mitochondria|mitochondria]] and [[sarcoplasms|sarcoplasms]]. <br> | ||
=== References === | |||
References | |||
<references /> | <references /> | ||
Revision as of 21:20, 1 December 2011
A myofibril is the single unit of a muscle. They form muscle fibres and contain different regions which some are effected during muscle contraction and relaxation. They are made up of 3 main long proteins; actin, myosin and titin. The previous mentioned proteins are ordered into thin or thick repeating filaments.
Myofibrils are the basis of contraction in skeletal muscle cells. They are cylindrical in shape and are 1-2μm[1] in diameter. The thick and thin filaments overlap each other and are made from different proteins. The thick filaments are made from myosin and the thin are made from actin. Each muscle fibre has many myofirbrils running through them. Skeletal muscle cells are often described as striated this is due to the repeating units of thick and thin filaments[2]. Between each myofibrils there are several mitochondria and sarcoplasms.