Sarcoplasm Information
The Sarcoplasm of a muscle fiber is comparable to the cytoplasm of other cells, but it houses unusually large amounts of glycosomes (granules of stored glycogen) and significant amounts of myoglobin, an oxygen binding protein. The calcium concentration in sarcoplasma is also a special element of the muscular fiber by means of which the contractions takes place and regulates.
Other than the fact that it contains mostly myofibrils (which are composed of sarcomeres), its contents are otherwise comparable to those of the cytoplasm of other cells. It has a Golgi apparatus, near the nucleus, mitochondria just on the inside of the cytoplasmic membrane or sarcolemma, as well as a smooth endoplasmic reticulum organized in an extensive network.
External links
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Histology: muscle tissue (TH H2.00.05, H3.3)
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| Smooth
muscle |
Calmodulin · Vascular smooth muscle
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| Striated
muscle |
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Skeletal
muscle
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Costamere/
DAPC
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Membrane/
extracellular
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DAP: Sarcoglycan (SGCA, SGCB, SGCD, SGCE, SGCG, SGCZ) · Dystroglycan
Sarcospan · Laminin, alpha 2
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Intracellular
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Dystrophin · Dystrobrevin (A, B) · Syntrophin (A, B1, B2, G1, G2) · Syncoilin · Dysbindin · Synemin/desmuslin
related: NOS1 · Caveolin 3
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Sarcomere/
(a, i, and h bands;
z and m lines)
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Myofilament (thin filament/actin, thick filament/myosin, elastic filament/titin, nebulin)
Tropomyosin
Troponin (T, C, I)
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Connective tissue
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Epimysium · Fascicle · Perimysium · Endomysium · Connective tissue in skeletal muscle
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General
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Neuromuscular junction · Motor unit · Muscle spindle · Excitation-contraction coupling · Sliding filament mechanism
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Cardiac
muscle
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Myocardium · Intercalated disc · Nebulette
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Both
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Other/
ungrouped
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Myotilin · Telethonin · Dysferlin · Fukutin · Fukutin-related protein
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: MUS, DF+DRCT
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noco(, , )/()/, /,
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, drug (/)
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Categories:
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