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.
Question
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.
Solution
The correct answer is "occurs between the first and second heart sounds."
Here's why:
-
Ventricular systole is the phase of the cardiac cycle during which the ventricles contract, pumping blood out of the heart. This phase occurs between the first and second heart sounds. The first heart sound (S1) is produced by the closure of the atrioventricular valves, signaling the start of ventricular systole. The second heart sound (S2) is produced by the closure of the semilunar valves, signaling the end of ventricular systole and the start of ventricular diastole.
-
Ventricular systole does not last longer than ventricular diastole. In a normal cardiac cycle, diastole (the relaxation phase) lasts longer than systole (the contraction phase).
-
Ventricular systole does not occur just prior to the first heart sound. As mentioned above, the first heart sound signals the start of ventricular systole.
-
Ventricular systole is not the relaxation phase of the ventricles. It is the contraction phase. The relaxation phase is known as ventricular diastole.
Therefore, the statement "occurs between the first and second heart sounds" is the correct choice.
Similar Questions
The phase in the cardiac cycle in which the ventricles relax between contractions is calledSelect one:a.systole.b.diastole.c.fibrillation.d.vasodilator.
The contraction of a heart chamber is called _____.Multiple choice question.systoledepolarizationrepolarizationdiastole
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
Which statement is correct with regarding to the cardiac cycle ?The pause between the end of the second heart sound and the beginning of the first heart sound coincides with ventricular diastoleDuring ventricular systole, atrioventricular valves open and semilunar valves closeFrom the atria nearly 70% of the blood flows into the ventricles during atrial systoleThe first heart sound is of shorter duration and created by the closure of the semilunar valves.
28. During which phase of cardiac cycle is ventricular volumelowest?A. Isovolumetric ventricular contractionB. Isovolumetric ventricular relaxationC. Atrial systoleD. Rapid ventricular ejection
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.