Term
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Definition
| Structure that aids in movement of the body and its parts |
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Term
| Excitability or irritability |
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Definition
| Ability to receive a stimulus from some other source which can be a charged ion. |
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Definition
| Oxygen binding protein stored inside muscle cell |
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Definition
| Area in A band with no thin filaments |
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Term
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Definition
| Bisects the I band made of connecting proteins; Anchors thin filaments; connects myofibrils throughout the muscle |
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Definition
| SER functions to regulate Calcium in muscle tissue; releases and reuptate of calcium in and out of sarcoplasm |
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Definition
| During contraction the thin filaments slide past the thick filaments so that the actin and the myosin will overlap to a greater degree. Ina relaxed muscle, the actin and the myosin only overlap slightly. |
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Term
| First step of muscle fiber contraction |
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Definition
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Term
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Definition
| Expose of Binding sites, therefore the myosin attach |
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Term
| Second step during muscle fiber contraction |
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Definition
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Term
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Definition
Myosin heads pivot which slides the actin toward the M line. - Shortening of Z line
- shortening of sarcomere
- closing of H zone
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Term
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Definition
| the axon of a motor neuron ends at the muscle fiber by ionic electrical impulse |
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Term
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Definition
on switch to stimulate muscle contraction - nerve sends signal to neuromuscular junction
- ACh binds to receptors of sarcolemma
- opening of NA+ channels -> Na+ influx = diffusion
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Term
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Definition
Time between repolarization to adjacent areas of sarcolemma
- activates Na+ K+ pump to restore sarcolemma resting state |
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Term
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Definition
| Motor neuron + muscle fibers |
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Term
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Definition
| single muscle cell contraction or action potential |
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