Which of these statements describes why the heart valves open and close? A)They are attached to the heart muscle. B)There is turbulent flow in the atria and ventricles. C) Na⁺ and K⁺ fluxes occur during ventricular depolarization. D) There is a pressure difference on the two sides of the valve.

Question

Quizplus · Accepted Answer

The heart valves open and close due to a pressure difference on the two sides of the valve. When the pressure on one side of the valve is greater than the pressure on the other side, the valve opens to allow blood to flow through. When the pressure on the opposite side becomes greater, the valve closes to prevent backflow of blood. This is necessary to ensure that blood flows through the heart and body efficiently.

Which of These Statements Describes Why the Heart Valves Open