Gaois

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  1. SOCIAL QUESTIONS|health|medical science

    #624758

    IATE #1315185
    líontán sarcaplasmach Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
    ga
    sarcoplasmic reticulum | SR | sarcoplasmatic reticulum
    en
    Definition "structure similar to endoplasmic reticulum [ IATE:1075856 ] whose primary function is to store calcium ions and on whose membrane there are a) pumps for calcium so that calcium is constantly being ""pumped"" into it from the cytoplasm of the muscle cell and b) openings for calcium" Reference "Gary Ritchison http://people.eku.edu/ritchisong/homepage.htm > Human Physiology (BIO 301) > Lecture Notes 3 - Muscle http://people.eku.edu/ritchisong/301notes3.htm [4.6.2012]"
    Comment "In a relaxed muscle, these gates are closed and calcium cannot pass through the membrane. So, the calcium remains in the SR. However, if an impulse travels along the membrane of the SR, the calcium ""gates"" open and, therefore, calcium diffuses rapidly out of the SR and into the sarcoplasm where the myofibrils and myofilaments are located. This is a key step in muscle contraction."