Which heart sound occurs at the beginning of isovolumetric contraction?Multiple choice question.ThirdFirstSecond

Which of the following indicates the first and second heart sound in the correct order a. Atrioventricular valve closure — semilunar valve closure b. Ventricular diastole — atrioventricular valve closure c. Atrial systole — ventricular systole d. Ventricular systole — semilunar valve closure

The contraction of a heart chamber is called _____.Multiple choice question.systoledepolarizationrepolarizationdiastole

Heart sounds are generated when blood vibrates the wall of the heart due to the ______ of the valves.Multiple choice question.stretchingopeningclosing

When the first heart sound is heard, what is occuring with the heart valves?Multiple ChoiceThe semilunar valves are closing.The AV valves are opening.The semilunar valves are opening.The AV valves are closing.

Ventricular systoleMultiple Choicelasts longer than ventricular diastole.occurs just prior to the first heart sound.occurs between the first and second heart sounds.is the relaxation phase of the ventricles.All of the choices are correct.