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.

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.

Fill in the Blank QuestionFill in the blank question.The rise and fall of blood in the heart chambers is the cause of the opening and closing of heart valves.

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

There is unidirectional flow of blood in the arteries due topresence of valveshigh pressure of blood from the heartinelastic walls of arteriesnone of the above

The opening and closing of the heart valves is associated with ______.Multiple choice question.changes in blood oxygenationchanges in blood compositionchanges in chamber pressurestretch of tissue fibers in the pericardium