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Muscle & Contraction
Muscle ContractionTest
| Question | Answer |
|---|---|
| Connective tissue, enshething a bundle of muscle cells | perimysium |
| Connective tissue, enshething the entire muscle | epimysium |
| Contractile unit of muscle | sarcomere |
| A muscle cell | fiber |
| Thin, reticular connective tissue investing each muscle cell | endomysium |
| Cell membrane of a muscle cell | sarcolemma |
| A long, filamentous organelle found withhin muscle cells; has a banded appearance. | myofilament |
| Actin or myosin containing structure | myofibril |
| cord-like extension of connective tissue beyond the muscle, serving to attach it to the bone. | tendon |
| voluntary muscle | skeletal |
| A band | myosin |
| I band | actin |
| The junction between a motor neuron's axon and the muscle cell membrane. | neuromuscular |
| A motor neuron and all of the skeletal muscle cells it stimulates | motor unit |
| the actual gap between an axonal ending and the muscle cell | synaptic cleft |
| a neurotransmitter within the motor unit | Acetylcholine |
| Na+ | Sodium ions |
| K+ | Potassium ions |
| Ca+ | Calcium ions |
| specialized smooth endoplasmic reticulum | sarcoplasmic reticulum |
| thick filaments | myosin |
| thin filaments | actin |
| Several sheathed muscle fibers wrapped by a perimysium | fascicle |
| single, brief, jerky contraction | muscle twitch |
| nerve impulse | action potential |
| causes muscle soreness | lactic acid |
| production of ATP without oxygen. | anaerobic respiration |
| production of ATP with oxygen | aerobic respiration |
| produces the most ATP molecules | aerobic respiration |
| energy molecules | ATP |
| anaerobic respiration waste | lactic acid |
| wasting away of muscle | atrophy |
| contraction in which muscle shortens and movement occurs | isotonic contraction |
| contraction in which tension increases but muscle doesn't shorten and movement does not occur. | isometric contraction |
| muscle can no longer contract. | muscle fatigue |
| the state of continuous partial contractions | muscle tone |
| rapid stimuli with no evidence of relaxation and the contractions are completely smooth and sustained. | tetanus |
| an electrical event occuring when sodium ions move within a neuron. | action potential |
| "resting cell" | polarized |
| the rush of sodium ions into a cell and potassium ion out of the cell. "action potential" | depolarization |
| the return to a cell is that is said to be "resting". | repolarization |
| causes a nerve cell to produce a action potential. | stimuli |
| a ion on the myofilaments, that causes the myofilaments to slide past one another. | calcium |
| contraction occurs in which muscle shorten and work in done. | isotonic |
| contraction occurs in which the muscle does not shorten but tension in the muscle keeps increasing and no movement occurs. | isometric |
| energy source used to make ATP during aerobic respiration. | glucose |
| number of ATP molecules made during aerobic respiration. | 36 |
Created by:
osucowboyup
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