Sliding Filament
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| In the neuromuscular junction, the end of the motor neuron is called the: | Axon Terminal
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| In the neuromuscular junction, the membrane of the muscle fiber is called | Sarcolemma
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| The sarcoplasmic reticulum of a muscle fiber contains. | Calcium ions
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| Within a sarcomere, the contracting proteins are: | mysoin and actin
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| During a state of polarization,___ ions are abundant outside the cell, and ____ ions are abundant inside the cell. | Sodium / potassium
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| During a state of polarization, the sarcolemma has a ___ charge outside and a ___ charge inside. | positive / negative
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| During DEPOLARIZATION, the sarcolemma has a ___ charge outside and a ___ charge inside. | negative / positive
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| When repolarization takes place,is potassium indside or outside the cell? Is sodium inside or outside the cell? | outside / inside
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| DEPOLARIZATION of a muscle fiber is stimulated by | Acetylcholine
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| In the sliding filament mechanism of a muscle contraction,the stimulus for contraction is | Acetylcholine
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| In the sliding filament mechanism of a muscle contraction,the proteins that inhibit contractions are | troponin and tropomyosin
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| In the sliding filament mechanism of a muscle contraction, the proteins that slide past each other as the muscle fiber shortens are | actin / myosin
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| For relaxation of the muscle to occur,__inactivates acetylcholine and ___ ions returned to the sarcoplasmic reticulum. | Cholinesterase / calcium
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| A layer of connective tissue covering each muscle fiber. | Endomysium
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| The layer of connective tissue covering the whole muscle. | Epimysium
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| The cell membrane of each muscle fiber. | Sarcolemma
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| Layer of connective tissue that covers the fascicles within each muscle. | Perimysium
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| What two things happen to stimulate muscle contractions? | release of acetylcholine at motor end plate and release of calcium from sarcoplasmic reticulum
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| Which myofibril does calcium bind to after release from the sarcoplasmic reticulum | Tropin
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| Myosin forms a crossbridge when it binds to actin and pulls the actin. True or False | True
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| What is required to help release the myosin heads from the actin and get them back into a cocked position? | ATP is needed for the myosin head crossbridge to detach from actin and re-cock
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Created by:
Alechia1
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