What is a pulse?Multiple choice question.The expansion of a vein caused by the backflow of blood in the vessel.The return of blood through the venous system to the heart.The sound produced by the closing of the AV valves.The expansion and recoil of an artery wall that can be felt near the body's surface.

A pulse is caused by _______*1 pointthe valves in an artery opening and closing.changes in blood pressure in the artery.red blood cells colliding with each other in the arteries.oxygen entering the blood in the lungs.

How did the body position affect the pulse rate?  Explain the physiological aspects of why this occured for each position.

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

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

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