Which of the following criteria must be met for the heart to function efficiently?
A)Excitation and contraction of each heart chamber should be coordinated to ensure efficient pumping.
B)The atria should be excited and contract before the onset of ventricular contraction to ensure that ventricular filling is complete.
C)The right side of the heart should contract first to ensure that oxygenated blood is delivered to the heart before the left side contracts.
D)Both a and b
E)Both b and c

Question

Quizplus · Accepted Answer

Both options A and B are necessary for efficient pumping of the heart. The coordinated excitation and contraction of each heart chamber ensures that blood is pumped in the correct sequence and direction. The atria contracting before the ventricles ensures that blood is properly filled into the ventricles before they contract. Option C is incorrect as both the right and left sides of the heart contract simultaneously, and the pulmonary and systemic circulatory systems do not need to be activated in any particular order.

Which of the Following Criteria Must Be Met for the Heart