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What proteins are found in a sarcomere?
Actin, Myosin, Troponin and Tropomyosin
The Sarcoplasmic Reticulum
The Myofibril
Only Actin and Myosin
Myofibrils have light and dark bands called neuromuscular junctions.
The contractile elements of muscle fibres are called ________.
Sarcoplasm
Fasciculi
Myofibrils
The sliding filament theory of muscle contraction involves;
Calcium ions releasing ATP for energy
Neuromuscular junctions directly producing the movement of actin and myosin
Actin filaments moving the myosin filaments in each sarcomere
Calcium ions binding with troponin, which shifts tropomyosin and allows the myosin-binding sites on actin to be exposed
The junction between a nerve and a muscle is called a_____________.
Neuromuscular junction
Neurotransmitter
Synapse
Sarcomere
A muscle contraction begins with release of _______, which reaches a sarcolemma, depolarizing the sarcolemma.
ATP
Acetylcholine
Troponin
Calcium