Question

What is happening during the "pause" phase when the heart is resting (relaxing)?

A) Ventricles are filling.
B) Valves are closing.
C) Atria are contracting.
D) Ventricles are contracting.

Answer 1

During the pause phase when the heart is resting, the ventricles are filling and the valves are closing to prevent blood from flowing back into the atria.

Step-by-step explanation:

During the "pause" phase, also known as diastole, the heart is resting and relaxing. During this phase:

• The ventricles are filling as blood flows from the atria into the ventricles.
• The valves are closing to prevent blood from flowing back into the atria.

Therefore, the correct answer is A) Ventricles are filling.