Term
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Definition
| ligand gated channel on the muscle cell through which acetylcholine flows |
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Term
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Definition
| acts with myosin filaments in order to make the muscle contract and release |
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Term
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Definition
| nerve impulse that causes the potential of the cell to rapidly rise and fall |
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Term
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Definition
| oxygen using metabolism, ATP comes from carbohydrates, fatty acids, and amino acids |
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Term
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Definition
| non-oxygen using metabolism in which ATP comes from the combustion of carbohydrates in the absence of oxygen |
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Term
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Definition
| energy needed for muscle contraction, adentasin triphosphate |
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Term
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Definition
| pump calcium ions into and out of the sarcoplasmic reticulum |
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Term
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Definition
| cross bridge is active, lasts until the peak of tension, 10-100ms |
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Term
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Definition
| fuel source for type 2a and 2b muscle fibers |
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Term
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Definition
| the attachment site when myosin and actin are working together |
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Term
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Definition
| when the voltage of the motor neuron becomes less negative |
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Term
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Definition
| different electrical potential and chemical concentration |
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Term
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Definition
| bundle of muscle fibers within the muscle |
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Term
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Definition
| serves as a form of energy storage |
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Term
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Definition
| when glucose is converted into pyruvic acid and energy is released in the form of ATP. |
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Term
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Definition
| when the voltage of the motor neuron becomes extremely negative |
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Term
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Definition
| potassium channels that are always open, allow potassium ions to continuously flow through |
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Term
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Definition
| byproduct of exercise, causes muscle fatigue and soreness |
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Term
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Definition
| first few seconds following stimulation, muscle tension begins to increase, contraction coupling is occurring |
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Term
| ligand-gated Na+ channels |
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Definition
| gated sodium channels that open when activated by neurotransmitters, allow sodium ions to flow through |
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Term
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Definition
| creator of ATP energy, powerhouse of the cell |
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Term
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Definition
| motor neuron and all the muscle fibers it supplies |
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Term
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Definition
| tubes spread throughout the muscle |
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Term
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Definition
| response of a motor unit to an action potential of its motor neuron, muscle fiber quickly contracts and then releases |
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Term
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Definition
| tubes within the muscle fibers |
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Term
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Definition
| chains of myosin and actin, make up the myofibrils |
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Term
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Definition
| acts with actin in order to make the muscle contract |
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Term
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Definition
| part of myosin that acts with actin |
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Term
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Definition
| Sodium channel that is always open, continuously allows sodium ions to flow through |
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Term
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Definition
| pump sodium and potassium ions into and out of the neuron |
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Term
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Definition
| synaptic cleft between the neuron and the muscle |
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Term
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Definition
| extra oxygen that must be taken into the body to restore all systems to their normal states after exercise |
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Term
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Definition
| initiated by reentry of Ca2+ into the sarcoplasmic reticulum, muscle tension returns to baseline, if muscle was shortened in contraction phase it returns to its original length |
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Term
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Definition
| when the voltage of the motor neuron becomes more positive |
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Term
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Definition
| the potential of the neuron in its resting state, -70mV |
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Term
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Definition
| contractile unit of a myofibril, contains parallel actin and myosin filaments |
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Term
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Definition
| within the muscle cell, calcium ions are pumped into it |
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Term
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Definition
| membrane on the muscle cell in which the T tubule is located |
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Term
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Definition
| tube in the sarcolemma through which the acetylcholine flows |
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Term
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Definition
| blocks myosin and actin from interacting |
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Term
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Definition
| pushes the tropomyosin out of the way so that myosin and actin may interact |
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Term
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Definition
| aerobic muscle fiber, uses triglycerides for fuel, extended motion |
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Term
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Definition
| anaerobic muscle fiber, uses creatine phosphates and glycogen for fuel, rapid motion |
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Term
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Definition
| anaerobic muscle fiber, uses creatine phosphates and glycogen for fuel, very rapid motion |
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Term
| voltage-gated K+ channels |
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Definition
| potassium channels that only open once the motor neuron has reached a certain voltage |
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Term
| voltage-gated Na+ channels |
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Definition
| sodium channels that only open once the motor neuron has reached a certain voltage |
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