While shopping at your local drugstore, you stop at the blood pressure machine. It measures your blood pressure as 115/75 (good-that's healthy!). This number means that
A. arterial pressure is 115 mm Hg when the atria contract and 75 mm Hg in between atrial contractions.
B. your sinoatrial node generates a 115 mV signal and your atrioventricular node generates a 75 mV signal.
C. arterial pressure is 115 mm Hg when the ventricles contract and 75 mm Hg in between ventricular contractions.
D. your sinoatrial node generates a 75 mV signal and your atrioventricular node amplifies this to a 75 mV signal.
E. arterial pressure is 75 mm Hg when the ventricles contract and 115 mm Hg in between ventricular contractions.
Answer: C
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