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Quiz-muscle - c It contains intercalated discs d It has...

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Quiz – Muscle In skeletal muscle fibers, which one of the following would have ATPase activity? a. Actin filaments b. Myosin filaments c. Troponin I d. Troponin-C e. Tropomyosin Which one of the following DOES occur in skeletal muscle contraction? a. The SR releases calcium ions b. Calcium ions bind to tropomyosin c. Calcium ions bind to calmodulin d. The Z-line shortens e. Myosin lengthens Which one of the following statements BEST characterizes cardiac muscle? a. It lacks striations b. It is comprised of long straight fibers
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Unformatted text preview: c. It contains intercalated discs d. It has myoneural junctions e. The fibers are multi-nucleated All of the following are true concerning this tissue, EXCEPT one. a. Contains myosin b. Contains Actin c. Contains sarcoplasmic reticulum d. Contains T-tubules e. Contains calmodulin The usual signaling agent at the neuromuscular junction is which one of the following? a. Dopamine b. Acetylcholine c. Neurophysin d. Serotonin e. Dynein...
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