Anatomy Lab Quiz 1 (Muscle And Heart)

25 July 2022
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question
What is the role of tropomyosin in skeletal muscle?
answer
Tropomyosin serves as a contraction inhibitor by blocking the myosin binding sites on the actin molecules.
question
Excitation-contraction coupling requires which of the following substances?
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Ca^(2+) and ATP.
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What structure in skeletal muscles cells functions in calcium storage?
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Sarcoplasmic reticulum.
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Which of the following surrounds the individual muscle cells?
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Endomysium.
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During the period of ventricular filling
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Blood flows mostly passively through the atria and the open AV valves into the ventricles.
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Correct Statement about heart valves:
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The AV valves are supported by chordae tendinae so that regurgitation of blood into the atria during ventricular contraction does not occur.
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When viewing a dissected heart, it is easy to visually discern the right and left ventricle by
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noticing the thickness of the ventricle walls.
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Which of the following is not part of the conduction system of the heart?
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AV valve.
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Which vessel(s) of the heart receive(s) blood during right ventricular systole?
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Pulmonary trunk.
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Blood within the pulmonary veins returns to the
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Left atrium.