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The Heart Valves Open and Close Due to

Question 5

Multiple Choice

The heart valves open and close due to


A) Stimulation by the sympathetic and parasympathetic nerves
B) A pressure difference on the two sides of the valve
C) Na+ and K+ fluxes during ventricular depolarization
D) Turbulent flow in the atria and ventricles
E) None of the choices are correct

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