click below
click below
Normal Size Small Size show me how
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 |