BIO 105 Chapter Notes - Chapter 9: Sliding Filament Theory, Endoplasmic Reticulum, Myosin Head
Document Summary
Skeletal: striated (you see the bands of actin and myosin), voluntary, neurogenic (need nerve cell stimulation. If you sever a nerve, whatever muscle was attached will no longer be able to contract) Cardiac: striated (you see the bands of acting and myosin), involuntary, myogenic (work by itself, muscle itself generates the contraction, the heart will keep beating if you took it out of organism and kept the correct chemicals. Smooth: non-striated (you cannot see the bands, proteins are still there, just arranged differently), involuntary, myogenic or neurogenic (depends on what smooth muscle it is) All three rely on: actin and myosin (myofilaments) for contractions. (myofilaments = microfilaments of the cytoplasm) Myo- and sarco- refer to muscles, ie. myofilament, myogenic, sarcolemma (cell membrane of muscle cell), sarcoplasm (cytoplasm of muscle cells), sarcoplasmic reticulum (modified endoplasmic reticulum in muscle cells which stores and releases calcium)
