What is the function of sinoatrial node?*1 pointProtects heartPrevents backflow of bloodRegulates contraction and relaxation of heart musclesHolds heart in positio

Choose all the functions of the sinoatrial node.Question 3Select one or more:a.to regulate atrial systole.b.The impulse wave travels throughout the muscle of the atria, causing the cells to contract.c.to act as the heart's pacemaker.d.The sinoatrial node generates an electrical pulses at intervals.

Fill in the Blank QuestionFill in the blank question.The sinoatrial node is a mass of specialized noncontractile cells located just beneath the epicardium in the atrium near the opening of the superior .

What answer best describes the location of the sinoatrial node?

Which of the following is said to the be the pacemaker of the heart:The atrioventricular nodeThe semilunar nodeThe sinoatrial nodeThe Purkinje fibres

What is the function of the papillary muscles of the heart?Multiple ChoiceTo help conduct cardiac impulses throughout the ventricular myocardiumTo hold the semilunar valves closed during ventricular diastoleTo prevent atrioventricular valves from prolapsingTo assist in the ejection of blood