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MUSCLE, FASCIA - Coggle Diagram
MUSCLE
FASCICLE
MUSCLE FIBER
MYOFIBRIL
SARCOMERE
Two main protein filaments:
- Actin are the thin filaments
- Myosin are the thick filaments
make up the majority of each sarcomere's protein filaments (myofilaments).
Tropomyosin
- Blocks myosin binding when muscle is relaxed
- Smallest contractile unit of muscle fiber
- Consist A band with 1/2 band at each end
- Individual sarcomeres align end to end along myofibril, like boxcars of train
- Striations
- Sarcomeres
Myofilaments
- Molecular composition of Myofilaments
- Microanatomy
- Densely packed
- Rod-like elements
- 80% of muscle volume
- About a thousand myofibrils in a single muscle fiber
- Cell
- Bundles of muscle fiber forms fascicle
- Elongated multinucleated cell
- Striated
- Covered by endomysium
- Also wrapped in Sarcolemma
- Sarcoplasmic Reticulum
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- Portion of muscle
- bundle of muscle fibers isolated from the rest by a CT sheath
- Consists of thousands of muscle cells, CT wrappings, blood vessels, and nerve fibers
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Movement
- Body mobility (locomotion, manipulation)
- Enables quick response to stimuli
Stabilizes joints
- muscle tendons reinforces and stabilizes joints that have poorly fitting articulating surface
Maintains posture
- Makes tiny adjustments to maintain erect/seated posture to counter the downward pull of gravity
- Has anti-gravity: Masseter, Hamstring
Generate heat
- Thermoregulation
- ATP are used for muscle contraction, 3/4 of energy escapes heat
- Fight-or-Flight, Rest-and-Digest
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FASCIA
A sheet-like, plastic cover
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