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