Sarcolemma - wikipedia Sarcolemma This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. ( May 2013 ) Sarcolemma Skeletal muscle, with sarcolemma labeled at upper left. Identifiers Code TH H2. 00.05. 0.00003 TH H2. 00.05. 0.00003 Anatomical terminology ( edit on Wikidata ) The sarcolemma ( sarco ( from sarx ) from Greek ; flesh, and lemma from Greek ; sheath. ) also called the myolemma, is the cell membrane of a striated muscle fiber cell. It consists of a plasma membrane, which is a lipid bilayer, and an outer coat consisting of a thin layer of polysaccharide material ( glycocalyx ) that contacts the basement membrane, which contains numerous thin collagen fibrils and specialized proteins such as laminin that provide a scaffold for the muscle fiber to adhere to. Through transmembrane proteins residing in the plasma membrane, the actin skeleton inside the cell is connected to the basement membrane and the cell 's exterior. At each end of the muscle fiber, the surface layer of the sarcolemma fuses with a tendon fiber, and the tendon fibers in turn collect into bundles to form the muscle tendons that then adhere onto bones. The sarcolemma generally maintains the same function in muscle cells as the plasma membrane does in other eukaryote cells. It acts as a barrier between the extracellular and intracellular compartments, defining the individual muscle fiber from its surroundings. The lipid nature of the membrane allows it to separate the fluids of the intra - and extracellular compartments, since it is only selectively permeable to water through aquaporin channels. As in other cells this allows for the compositions of the compartments to be controlled by selective transport through the membrane. Membrane proteins, such as ion pumps, may create ion gradients with the consumption of ATP, that may later be used to drive transport of other substances through the membrane ( Co-transport ) or generate electrical impulses such as Action potentials. A special feature of the sarcolemma is that it invaginates into the cytoplasm of the muscle cell, forming membranous tubules radially and longitudinally within the fiber called transverse tubules ( T - tubules ). On either side of the transverse tubules are Terminal cisterna enlargements of smooth endoplasmic reticulum termed sarcoplasmatic reticulum ( SR ) in muscle. A transverse tubule surrounded by two SR cisterna are known as triads, and the contact between these structures is located at the junction of the A and I bands. See also MCB portal Cell membrane References Jump up ^ Sarcolemma at the US National Library of Medicine Medical Subject Headings ( MeSH ) Jump up ^ Engvall, E. ; Earwicker D ; Haaparanta T ; Ruoslahti E ; Sanes JR. ( September 1990 ). `` Distribution and isolation of four laminin variants ; tissue restricted distribution of heterotrimers assembled from five different subunits ''. Cell Regulation. 1 ( 10 ) : 731 -- 40. PMC 361653. PMID 2099832. doi : 10.1091 / mbc. 1.10. 731. Jump up ^ Boron, Walter F. ( 2009 ). Medical Physiology 2nd edition. Philadelphia : Saunders. pp. 9 -- 21. Muscle tissue Smooth muscle Calmodulin Vascular smooth muscle Striated muscle Skeletal muscle Costamere / DAPC Membrane / extracellular DAP : Sarcoglycan SGCA SGCB SGCD SGCE SGCG SGCZ Dystroglycan Sarcospan Laminin, alpha 2 Intracellular Dystrophin Dystrobrevin Syntrophin B1 B2 G1 G2 Syncoilin Dysbindin Synemin / desmuslin related : NOS1 Caveolin 3 Sarcomere / ( a, i, and h bands ; z and m lines ) Myofilament thin filament / actin thick filament / myosin elastic filament / titin nebulin Tropomyosin Troponin Connective tissue Epimysium Fascicle Perimysium Endomysium Connective tissue in skeletal muscle General Neuromuscular junction Motor unit Muscle spindle Excitation -- contraction coupling Sliding filament mechanism Cardiac muscle Myocardium Intercalated disc Nebulette Both Fiber Muscle fiber intrafusal extrafusal Myofibril Microfilament / Myofilament Sarcomere Cells Myoblast / Myocyte Myosatellite cell Other Desmin Sarcoplasm Sarcolemma T - tubule Sarcoplasmic reticulum Other / ungrouped Myotilin Telethonin Dysferlin Fukutin Fukutin - related protein Retrieved from `` https://en.wikipedia.org/w/index.php?title=Sarcolemma&oldid=778190304 '' Categories : Membrane biology Hidden categories : Articles needing additional references from May 2013 All articles needing additional references Talk About Wikipedia Deutsch Español فارسی Bahasa Indonesia Italiano Қазақша Nederlands 日本 語 Polski Português Русский Українська Tiếng Việt Edit links This page was last edited on 1 May 2017, at 17 : 19. About Wikipedia

Question: the cell membrane of a muscle cell is called the
Answer: sarcolemma