In the normal heart

A The atrioventricular (Anode is usually supplied by the right coronary artery
B 1-adrenoreceptors mediate chronotropic response
C Pulmonary artery systolic pressure normally varies between 40 and 140 mm of Hg
D The annulus fibrosus aids conduction of impulses from the atria to the ventricles
E Cardiac output is the product of heart rate and ventricular end diastolic volume

Correct Answer: The atrioventricular (Anode is usually supplied by the right coronary artery, 1-adrenoreceptors mediate chronotropic response

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