Lexic.us

Definition of Muscle fibre

1. Noun. An elongated contractile cell that forms the muscles of the body.

Definition of Muscle fibre

1. Noun. (alternative spelling of muscle fiber) ¹

¹ Source: wiktionary.com

Medical Definition of Muscle fibre

1. Component of a skeletal muscle comprising a single syncytial cell that contains myofibrils. Any of the cells of skeletal or cardiac muscle tissue. Skeletal muscle fibres are cylindrical multinucleate cells containing contracting myofibrils, across which run transverse striations, enclosed in a sarcolemma. Cardiac muscle fibres contain one or sometimes two nuclei and myofibrils and are separated from one another by an intercalated disk; although striated, cardiac fibres branch to form an interlacing network. 2. fast-twitch muscles. Skeletal muscle fibres having high myofibrillar atpase activity, high glycolytic enzyme activities, and an intermediate glycogen content which produce a fast twitch. There are two types. Fast fatigable fibres, also called white fibres, have a low myoglobin content, and a small mitochondrial content, and fatigue rapidly due to their limited glycogen content and low capacity for oxidative metabolism. Fast fatigue-resistant fibres, also called red fibres, have a large mitochondrial content and a high myoglobin content, related to their resistance to fatigue. 3. slow-twitch muscles. Skeletal muscle fibres having low myofibrillar atpase activity, low glycogen content, and high myoglobin content, high mitochondrial oxidative enzyme activities, and an intermediate mitochondrial content which produce a slow twitch and are fatigue-resistant. (12 Dec 1998)

Lexicographical Neighbors of Muscle Fibre

Literary usage of Muscle fibre

Below you will find example usage of this term as found in modern and/or classical literature:

1. Encyclopaedia Britannica: A Standard Work of Reference in Art, Literature (1907)
"Put in a bald way, the main difference between a secreting cell and a muscle-cell, or elementary muscle-fibre as it is often called, is that in the former ..."

2. The American Journal of the Medical Sciences by Southern Society for Clinical Investigation (U.S.) (1902)
"Destruction of the nerve fibre does not necessarily mean a permanent wasting of the muscle fibre, since a fresh connection may be established between the ..."

3. A Text Book of Physiology by Michael Foster (1893)
"From this plexus are given off a number of nerve-fibres, running singly, each of which joining a muscle fibre ends in an end-plate. ..."

4. A Text-book of physiology by Michael Foster (1891)
"From this plexus are given off a number of nerve fibres, running singly, each of which joining a muscle fibre ends in an end-plate. ..."

5. The Outline of Science: A Plain Story Simply Told by John Arthur Thomson (1922)
"A striped muscle-fibre is due to the great elongation of a cell, with multiplication of nuclei (N), or to a fusion of elongated cells. ..."

6. General Physiology of Muscles and Nerves by Isidor Rosenthal (1881)
"The muscle-fibre would accordingly consist of regularly arranged muscle- elements, the sequence of which, in the longitudinal direction, ..."

Other Resources: