Question

During ventricular diastole
A)The auricles relax
B)The heart contracts
C)The heart pumps blood
D)The ventricles relax

Answer 1

Hint: Ventricular diastole is the time during which, from the contortions/wringing of contraction, the two ventricles relax, then dilate and fill; atrial diastole is the period during which the two atria, often relaxing under suction, dilation, and filling.

Complete answer:
The time during which the ventricles relax is called ventricular diastole. It is the moment in the ventricles that the blood pumps. The aortic valve and pulmonary valve remain closed to regulate the strain within the ventricles, while the atrioventricular mitral and tricuspid valves remain open to allow blood supply from the atria to the ventricle. Blood flows from the main veins into the relaxed atria and from there into the ventricles, when pressure decreases inside the ventricles.

The atrioventricular valves are open and the semilunar valves remain closed. Both chambers are in diastoles. Relax the atria (atrial diastole) during ventricular contraction and gain venous return from both the body and lungs. In the ventricular diastole, the lower chambers then contract, facilitating initial passive filling of the thick-walled ventricles and atrial emptying.

Hence, the correct answer is option (D)

Note: 1)The aortic valve shuts as the left ventricle relaxes and the mitral valve opens.
2)It allows blood to circulate into the left ventricle from the left atrium.
3)It contracts with the left atrium.