Final answer:
The 'lub' sound corresponds to the closing of the atrioventricular valves, not the semilunar valves; hence, the statement is false. It's the 'dub' sound that relates to the semilunar valves.
Step-by-step explanation:
The statement that the "lub" sounds of the heart provide information about the function of the heart's semilunar valves is false. The "lub", or S1 sound, is actually associated with the closing of the atrioventricular valves, which include the mitral and tricuspid valves, during ventricular contraction. The "dub", or S2 sound, corresponds to the closing of the semilunar valves (the pulmonary and aortic valves) during ventricular diastole. These heart sounds heard via auscultation are vital in diagnosing heart conditions like hypertrophic cardiomyopathy, a pathological enlargement of the heart, generally for no known cause.