Question

During the diastole cardiac cycle, which of the following occur?

A) Atria contract and empty of blood
B) Ventricles contract and empty of blood
C) The chambers refill with blood
D) Both A and B
E) All of the above

Answer 1

During the diastole cardiac cycle this occur:

C) The chambers refill with blood

Step-by-step explanation:

During the diastole phase of the cardiac cycle, the heart is in a state of relaxation. The correct option is C) The chambers refill with blood. This phase involves both the atria and ventricles undergoing relaxation, allowing them to fill with blood.

In the diastole phase, the atria receive blood from the body and the lungs. The atria contract, pushing blood into the ventricles. At the same time, the ventricles are in a relaxed state, allowing them to expand and receive blood from the atria. This filling of the chambers with blood is crucial for the subsequent systole phase, where the heart contracts to pump blood to the rest of the body.

Option A is incorrect because the atria contract during the systole phase, not diastole. Option B is also incorrect because the ventricles contract during the systole phase as well, and they do not empty of blood during diastole. Therefore, the correct answer is option C, as it accurately describes the process of chamber refilling with blood during the diastole phase of the cardiac cycle.