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The sarcolemma is the cell membrane of a muscle cell (skeletal, cardiac, and smooth muscle). It consists of a true cell membrane, called the plasma membrane, and an outer coat made up of a thin layer of polysaccharide material that contains numerous thin collagen fibrils. — “Sarcolemma - Wikipedia, the free encyclopedia”, en.wikipedia.org
This article is within the scope of the Molecular and Cellular Biology WikiProject. To participate, visit the WikiProject for more information. This article has not yet received a rating on the project's quality scale. Suggest referencing Sarcolemma and Sarcoplasmic Reticulum on same. — “Talk:Sarcolemma - Wikipedia, the free encyclopedia”, en.wikipedia.org
At these invaginations the sarcolemma is studded with a large number of L-type calcium channels. So, an action potential along the sarcolemma causes calcium channels to open in the terminal cisternae/sarcoplasmic reticulum. — “T-tubule - Wikipedia, the free encyclopedia”, en.wikipedia.org