thick filaments

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Related to thick filaments: thin filaments


(fil′ă-mĕnt) [L. filamentum, threading]
1. A fine thread.
2. A threadlike coil of tungsten found in the x-ray tube that is the source of electrons.

axial filament

A filament forming the central axis of the flagellum of a spermatozoon.

intermediate filament

Abbreviation: IF
Slender proteins found in all eukaryotic cells, measuring about 8 to 12 nm in diameter. Intermediate filaments are composed of proteins including desmin, keratins, lamins, and vimentin and together with microtubules and microfilaments form the cytoskeleton. Some malignant cells can be identified by the specific proteins in their intermediate filaments.

thick filaments

Myosin, seen microscopically.

thin filaments

Actin, seen microscopically.
Medical Dictionary, © 2009 Farlex and Partners

thick filaments

The myosin filaments in muscle cells.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
References in periodicals archive ?
The thin filaments are connected to the Zline, extend perpendicularly towards the M-line and along the length of the fiber, interdigitated with the thick filaments (Hopkins).
In the muscle fiber in which thin and thick filament were mixed, the thin filament was approximately 10 nm in diameter, whereas that of the thick filament was 80 nm.
The M-line material in the center of the A band [ILLUSTRATION FOR FIGURE 1 OMITTED] attaches the thick filaments to the basal lamina and thus could also transmit forces to the basal lamina; however, it is unlikely to contribute significantly to the compressive forces acting on the basal lamina.
Early dominance by green and brown filaments persisted over 230 d into the experiment, and red filaments (rather than thick filaments and blades) still dominated at the end of the year [ILLUSTRATION FOR FIGURE 4B OMITTED].
When the fiber receives a signal to contract, the thick filaments pull the combs together by "rowing" against the thin filaments.