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
Correct Answer:
Verified
Q24: Sinoatrial node cells
A)Are normally the pacemakers of
Q25: Which of the following statements about the
Q26: A heart murmur that is detected between
Q27: Which of the following statements about the
Q28: Which of the following statements about blood
Q30: Comparing excitation-contraction coupling in cardiac muscle with
Q31: Cardiac output is the
A)Volume of blood pumped
Q32: With regard to the regulation of heart
Q33: The Frank-Starling mechanism of the heart describes
A)The
Q34: The aortic valve
A)Prevents the backflow of blood
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