Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Anatomy Chapter 10
Skeletal Muscle
| Question | Answer |
|---|---|
| Skeletal Muscle: Terminology | Fibers, myofilaments, myofibril, sacrolemma, and sacroplasm |
| Skeletal Muscle: Terminology: Fibers | cells of skeletal and smooth muscle tissue |
| Skeletal Muscle: Terminology: Myofilaments | -special type of microfilaments CONTRACTILE PROTEINS that shorten muscle cells -ACTIN and MYOSIN |
| Skeletal Muscle: Terminology: Myofibril | -A complex ORGANELLE composed of bundles of myofilaments -Each muscle fiber contains 100 to 1000 of these than run parallel to its length -Account for 80% of cellular volume in a muscle cell |
| Skeletal Muscle: Terminology: Sarcolemma | plasma membrane of the muscle cell |
| Skeletal Muscle: Terminology: Sarcoplasm | -Cytoplasm of the muscle cell -GLYCOSOMES and MYOGLOBIN |
| Skeletal Muscle: Epimysium | -"Outside the muscle" -An overcoat of dense irregular connective tissue that surrounds the entire muscle -May blend with deep fascia between muscles |
| Skeletal Muscle: Perimysium | -"Around the Muscle" -Fibrous connective tissue that surrounds groups of muscle fibers call fascicles |
| Skeletal Muscle: Endomysium | -"Within the muscle" -Fine sheath of connective tissue composed of reticular fibers surrounding each muscle fiber (cell) |
| Skeletal Muscle: Microscopic Anatomy Sacroplasmic Reticulum Definition | -Interconnecting tubules of endoplasmic reticulum that surround each myofibril |
| Skeletal Muscle: Microscopic Anatomy Sarcoplasmic Reticulum Function | -store and regulate intracellular levels of Calcium (Ca2+) -Calcium is released when a muscle fiber is stimulated to contract |
| Skeletal Muscle: Microscopic Anatomy Sarcoplasmic Reticulum: TERMINAL CISTERNAE | -Sac like regions of the Sarcoplasmic Reticulum that contains calcium ions -perpencdicular to the myofibril |
| Skeletal Muscle: Microscopic Anatomy: Sarcomere | - The smallest contractile unit within a myofibril -Aligned end to end along a myofibril |
| Skeletal Muscle: Microscopic Anatomy: Sarcomere: TITIN | large protein in sarcomere that resists overstretching by holding the thick filament in place |
| Skeletal Muscle: Microscopic Anatomy: Sarcomere: Striation Pattern | -Repeating series of dark A bands and light I bands |
| Skeletal Muscle: Sarcomere: Striation Pattern: A Band | thick and thin filaments overlap |
| Skeletal Muscle: Sarcomere: Striation Pattern: I Band | region with only thin filaments |
| Skeletal Muscle: Sarcomere: Striation Pattern: Z Line | -defines the boundaries of each sacromere -where thin filaments from adjacent sacromeres attach |
| Skeletal Muscle: Sliding Filament Model of Contraction | -Myosin heads bind to thin filaments and bend, then detach and repeat several times during contraction, acting like a ratchet to generate tension and propel thin filaments to the center of the sacromere -As this occurs in sarcomeres, THE MUSCLES SHORTE |
| Skeletal Muslcle: Sliding Filament Model of Contraction: Initiation | -proces is initiated by the binding of calcium ions to the thin filaments and powered by ATP |
Created by:
vs604
Popular Anatomy sets