What causes the lubb-dubb sound of a heartbeat, as heard through a stethoscope?Multiple choice question.the rush of blood out of the ventricles and into the arteriesthe contraction of the atria and ventriclesthe vibrations in heart tissue as blood flow is slowed when valves close

The "lub" sound of the "lub-dub" heartbeat is due to what?Multiple Choicethe closing of the AV valvesthe closing of the semilunar valvesthe right atrium contractingthe left atrium contractingthe relaxation of both atria

A doctor listening to the heartbeat through a stethoscope hears two sounds, lub and dub.How are these two sounds produced?

Describe what causes the lub-dub soundyou hear when you listen to your heart.2 Describe the cause of the followingvalve conditions:a stenosisb regurgitation or insufficiencyc prolapse.3 Describe the function of the pericardiumsac that surrounds the heart.4 Describe the link betweenatherosclerosis and coronary heartdisease.5 Identify two things you could do toensure your circulatory system stayshealthy.6 Describe why the heart muscle becomesdamaged during a heart attack.7 Describe how the function of thepericardium is affected when it fills withfluid during an infection.7. 8 Check your learning

9.In a stethoscope, sound of heartbeats travel through the stethoscope’s tubeSelect an answerAas a sonic boomBin a straight lineCby bending along the tubeDby undergoing multiple reflections

The following are statements about heart sounds:     i. The beating of the heart and the pumping of the blood is associated with the generation of the sounds.    ii. The physicians are trained to diagnose heart disorders by listening to these sounds using a device called the stethoscope.    iii. A graphic record of the heart is called a phonocardiogram.1 pointi is correcti and ii are correcti and iii are correctall are correct