Heart MCQs with Answers

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The function of the heart valves is to control blood flow by ensuring blood moves in one direction and preventing backflow.

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The indirect effect of a rise in heart rate during a race is to increase ventilation of the lungs with fresh air, ensuring greater oxygen intake and carbon dioxide removal.

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The heart is made up of All of the above structures — cardiac muscles, connective tissue, and epithelial tissue.

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A frog's heart has three chambers — two atria and one ventricle.

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Low voltage QRS complexes in ECG are seen in pericardial effusion due to fluid accumulation around the heart that dampens the electrical signals.

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Amphibians have a 3-chambered heart, consisting of two atria and one ventricle.

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The circulatory system was discovered by William Harvey, an English physician who first accurately described blood circulation in 1628.

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The circulation of blood was discovered by William Harvey, an English physician who published his findings in 1628.

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Fish have a two-chambered heart, consisting of one atrium and one ventricle.

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Cardiorespiratory fitness primarily improves efficiency and endurance of the heart, lungs, and circulatory system.