Question

During atrial systole, blood flow toward the ventricles increases by what percent?

• A. 10%
• B. 30%
• C. 50%
• D. 70%

Answer 1

Answer:

B. 30%

• During the atrial systole, both the atria contract simultaneously while the ventricles remain relaxed.

• The increase in pressure in the atria forces 30% more blood to flow into the ventricles.