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GC Chapter 10/11
Skeletal muscle system
Question | Answer |
---|---|
Membrane that connects to the deep fascia and covers the muscle | epimysium |
Membrane that covers fasicles of muscle fibers | perimysium |
membrane that covers individual muscle fibers | endomysium |
How does muscle connect to bone | epi/peri/endo all come together to form tendons or aponeuresis |
stem cells in the endomysium that help repair damaged cells | myosatillite cells |
mesodermal cells that fuse to create muscle fibers | myoblasts |
muscle cell membrane | sarcolemma |
extension of the sarcolemma that allows transmission of AP to contract entire fiber | T-Tubes/Transverse Tubules |
lengthwise subdivisions of muscle fiber, made of protein filaments (myofilaments) | Myofibrils |
responsible for muscle contraction | myofilaments |
type of myofilament made of actin | thin filaments |
type of myofilament made of myosin | thick filaments |
attaches to t-tubes to form chambers and transmit AP to myofibril | Sarcoplasmic Reticulum |
chambers formed by SR | terminal cisternae |
function of cisternae | concentrate ca via ion pumps and release into sarcomeres to begin contraction |