study guide chapter 6
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| show | ability of skeletal muscle to shorten with force
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| excitability | show 🗑
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| show | ability to be stretched
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| elasticity | show 🗑
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| epimysium | show 🗑
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| show | another connective tissue located outside the epimysium that surrounds and separates muscles.
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| perimysium | show 🗑
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| show | numerous visible bundles that the muscles are composed of.
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| show | single muscle cells that the fasciculi are composed of.
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| show | connective tissue sheath that surrounds fibers
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| myofibrils | show 🗑
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| show | thin myofilaments
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| myosin myofilaments | show 🗑
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| sarcomeres | show 🗑
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| show | attachment site for actin
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| I band | show 🗑
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| show | extends the length of the myosin and is the darkest central region in each sarcomere.
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| show | light area in the center of each sarcomere
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| M line | show 🗑
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| show | change difference across the membrane
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| show | the brief reversal back of the charge
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| Motor neurons | show 🗑
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| axons | show 🗑
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| neuromusclular junction or synapse | show 🗑
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| show | single motor neuron and all the skeletal muscle fibers it innervates
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| single muscle | show 🗑
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| show | enlarged nerve terminal
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| show | space between the presynaptic terminal and the muscle cell.
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| show | muscle fiber
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| synaptic vesicles | show 🗑
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| show | neurotransmitter that diffuses across synaptic cleft and binds to the postsynaotic terminal causing change in the postsynaptic cell.
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| show | enzymes that break down acetylcholine released into the synaptic cleft between the neuron and muscle cell
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| show | sliding of actin myofilaments past myosin myofilaments during contraction
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| show | contraction of an entire muscle in response to a stimulus that causes the action potential in one or more muscle fibers.
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| threshold | show 🗑
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| show | phenomenon of threshold
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| lag phrase | show 🗑
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| show | time of contraction
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| show | time during which the muscle relaxes
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| tetany | show 🗑
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| recruitment | show 🗑
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| show | needed for energy for muscle contraction
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| show | produced in the mitochondria, short-lived and unstable, it degenerates to the more stable ADP plus phosphate.
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| show | more stable enegry
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| Creatine phosphate | show 🗑
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| show | without oxygen
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| aerobic respiration | show 🗑
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| show | amount of oxygen needed in chemical reactions to convert lactic acid to glucose and to replenish the depleted stores of creatine phosphate stores in muscle cells
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| show | results when ATP is used during muscle contraction faster than it can be produced in the muscle cells
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| two types of muscle contractions | show 🗑
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| show | length of the muscle does not change, but the amount of tension increases during the contraction process
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| show | the amount of tension produced by the muscle in constant during contraction, but the length of the muscle changes
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| show | refers to constant tension produced by muscles of the body for long periods of time. (Keeps head up and back straight)
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| fast-twithch fibers | show 🗑
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| slow-twitch fibers | show 🗑
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| show | the most stationary end of the muscle. (head)
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| insertion | show 🗑
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| belly | show 🗑
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| show | muscles that work together to accomplish movements
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| show | muscles that work in opposition to one another
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| show | among a group of synergists, if one muscle plays the major role in accomplishing the desired movement, it is the _____
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| Muslces | show 🗑
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| show | to produce heat essential for maintenance or normal body tempeature
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| What is each muscle fiber? | show 🗑
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| Cytoplasm of each fiber is__ | show 🗑
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| show | to major protein fibers -actin myofilaments -myosin myofilaments
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| show | highly ordered units called sarcomeres
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| show | formed by an enlarged nerve terminal resting in an indentation of the muscle cell membrane
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| show | occurs as actin and myosin myofilaments slide past one another causing the sarcomeres to shorten
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| During sliding filament mechanism... | show 🗑
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| show | you get successive twitches that occur so frequently the muscle does not have time to fully relax
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| during period of inactivity.. | show 🗑
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| show | origin and insertion
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| two characteristics of skeletal Muscle | show 🗑
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| show | positively charged compared to the inside of the cell memeberane, which is negatively charged.
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| show |
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