The Sinoatrial node is the normal pacemaker of the heart with a rhythm of 70-80 bpm. The SA node has an unstable resting potential. Question 4Answera.Both statements are TRUEb.First statement is TRUE. Second statement is FALSEc.Both statements are FALSEd.First statement is FALSE. Second statement is TRUE.

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

The SA node is the pacemaker of the heart because ofa. Location in the right atriumb. Neural control.c. Natural leakiness to Na+d. Natural leakiness to K+c. Natural leakiness to Ca2+

What is the normal pacemaker of the heart?Multiple ChoicePurkinje fibersSinoatrial nodeAtrioventricular nodeAV bundle

The normal pacemaker of the heart isGroup of answer choicesBundle of HisAV nodeSA nodePurkinje fiber

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 .