sarcoplasmic reticulum


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reticulum

 [rĕ-tik´u-lum] (L.)
1. a small network, especially a protoplasmic network in cells.
agranular reticulum smooth-surfaced endoplasmic reticulum.
endoplasmic reticulum an ultramicroscopic organelle of nearly all higher plant and animal cells, consisting of a system of membrane-bound cavities in the cytoplasm, occurring in two types: granular or rough-surfaced, bearing large numbers of ribosomes on its outer surface, and agranular or smooth-surfaced.
granular reticulum rough-surfaced endoplasmic reticulum.
sarcoplasmic reticulum a form of agranular reticulum in the sarcoplasm of striated muscle, comprising a system of smooth-surfaced tubules surrounding each myofibril.

sar·co·plas·mic re·tic·u·lum

the agranular endoplasmic reticulum of skeletal and cardiac muscle; the complex of vesicles, tubules, and cisternae forming a continuous structure around striated myofibrils, with a repetition of structure within each sarcomere.

sarcoplasmic reticulum

n.
The form of endoplasmic reticulum found in striated muscle fibers.

sarcoplasmic reticulum

[-plas′mik]
Etymology: Gk, sarx + plassein, to mold; L, reticulum, little net
a network of tubules and sacs in skeletal muscle fibers that plays an important role in muscle contraction and relaxation by releasing and storing calcium ions. This network is analogous, but not identical, to the endoplasmic reticulum of other cells.

sar·co·plas·mic re·tic·u·lum

(sahr'kō-plaz'mik rĕ-tik'yū-lŭm)
The endoplasmic reticulum of skeletal and cardiac muscle; the complex of vesicles, tubules, and cisterns forming a continuous structure around striated myofibrils, with a repetition of structure within each sarcomere.

sarcoplasmic reticulum

The endoplasmic reticulum of a muscle cell which stores and releases calcium ions.

sarcoplasmic reticulum

the cysternae of a single muscle fibre, equivalent to the ENDOPLASMIC RETICULUM of other cells.
References in periodicals archive ?
Williams, "Modification of the gating of the cardiac sarcoplasmic reticulum Ca(2+)-release channel by H2O2 and dithiothreitol," The American Journal of Physiology--Heart and Circulatory Physiology, vol.
Post mortem changes in Ca2+ transporting proteins of sarcoplasmic reticulum in dependence on malignant hyperthermia status in pigs.
After the heart beat, if you recall, most of the calcium returns to the storage bins in the sarcoplasmic reticulum and then awaits the next signal to do its job again.
The ryanodine receptor from canine heart sarcoplasmic reticulum is associated with a novel FK-506 binding protein.
Our data also demonstrates the disposition of sarcoplasmic components such as mitochondria, myofilaments and sarcoplasmic reticulum.
Binding interactions of porphyrin derivatives with Ca2+ ATPase of sarcoplasmic reticulum (SERCA1a).
During the plateau phase of the action potential, extracellular calcium enters the myocyte through the L-type calcium channel and elicits calcium release from the sarcoplasmic reticulum in a process termed calciuminduced calcium release [16, 17].
10] modes of action through oxidative stress, effects in mitochondria, sarcoplasmic reticulum, and cytoskeleton, among other biological and pharmacological activities are analyzed.
These functional junctions between t-tubules, which are invaginations of the surface membrane, and the sarcoplasmic reticulum allow efficient control of calcium release into the cytosol, and also its removal.
The smooth muscle contraction is proportional to both the intracellular free calcium concentration released from sarcoplasmic reticulum (Tribe et al.
An impairment of calcium release from the sarcoplasmic reticulum could be another factor for the prolongation in time to peak twitch tension in the diabetic soleus muscle.