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question
What is the correct order of skeletal muscle hierarchical organization, from largest structure to smallest structure?
answer
Entire muscle, muscle fasciculus, muscle fiber, myofibril
question
The connective tissue sheath that surrounds an individual skeletal muscle fiber is called the ______?
answer
Endomysium
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The striated appearance of skeletal muscle fiber is mainly due to _______?
answer
The arrangement of the actin and myosin filaments
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The plasmalemma performs what functions?
answer
accommodating muscle fiber stretch conducting action potentials transporting nutrients into the muscle fiber
question
What is the correct order of events in a contraction?
answer
T-Tubule action potential Ca2+ released cross-bridging Ca2+ re-uptake
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The A-Band of a sarcomere contains ______?
answer
Actin and myosin filaments
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Satellite cells are responsible for ______?
answer
Growth and development Injury repair Adaptations to training
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ATP is required for?
answer
Both muscle contraction and muscle relaxation
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Which protein shields the myosin-binding site, preventing contraction from happening at rest?
answer
Tropomyosin
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The speed of muscle fiber contraction is determined primarily by?
answer
Speed of myosin ATPase
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Strength is most accurately a property of the?
answer
Motor system
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Rapid movement or ballistic-type training may be particularly effective in stimulating increases in motor unit
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Rate coding
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Resistance training can decrease inhibitory impulses to agonist muscles by reducing ?
answer
Autogenic inhibition
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Transient hypertrophy is primarily stimulated by
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Edema
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Which intracellular change likely contributes the most to increases in fiber size, cross-sectional area, and strength?
answer
More actin and myosin filaments
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Protein synthesis _____ during exercise and _______ after exercise.
answer
Decreases, increases
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Resistance training can lead to the conversion of _____ fibers into _____ fibers.
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Type IIx, Typer IIa
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Which sarcomere structure reveals the most information about the intensity of eccentric workouts
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Z-Disk
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____ is the term used to describe a muscle's "wasting away" after it is no longer used or challenged.
answer
Atrophy
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If recruitment is ______, meaning that motor units are recruited at the same time, more force will be produced and the rate of production will be increased
answer
Synchronous
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