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19 Cards in this Set
- Front
- Back
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Anaerobic |
without oxygen |
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complete tetanus |
occurs when the rate of stimulation is increased until the relaxation phase is completely eliminated, producing maximum tensionCr |
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cross-bridges |
when they connect thick filaments and thin filaments, the myosin heads are called cross-bridges |
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Glycolysis |
the breakdown of glucose to pyruvic acid in the cytoplasm of the cell |
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insertion |
point of attachment of a muscle, the end that is most movable |
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isometric contraction |
the muscle as a whole does not change length, and the tension produced never exceeds resistance |
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isotonic contration |
tension rises and the skeletal muscles length changes. tension in the muscle remains at a constant level until relaxation |
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lactic acid |
compound produced from pyruvic acid under anaerobic conditions |
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motor unit |
all of the muscle cells controlled by a single motor neuron |
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myofilaments |
protein filaments consisting primarily of the proteins actin and myosin |
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myoglobin |
a globular protein structurally related to hemoglobin, the oxygen-carrying pigment found in blood |
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neuromuscular junction |
the communication link between the nervous system and a skeletal muscle fiber occurs at a specialized intercellular connection |
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origin |
end of muscle that attaches to a immovable joint |
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prime mover |
muscle responsible for a particular movement |
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sarcomere |
myofilaments are organized into repeating functional units called these |
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sarcoplasmic reticulum |
a specialized form of smooth endoplasmic reticulum |
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synergist |
muscle that assists action of prime mover |
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tendon |
cord of dense fibrous tissue connecting a muscle to a bone |
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transverse tubules |
tubular extensions of the sarcolemma that extends deep into the sarcoplasmic to contact terminal cisternae of the sarcoplasmic reticulum |
