What is the effect on the heart rate if the parasympathetic nerve is cut in a rabbit?

$A$: The resting heart rate,about $75$ beats/minute,is usually lower than the autorhythmic rate of the $SA$ node ($90-100$ beats/minute).
$R$: At rest,the parasympathetic nervous system effects dominate the heart rate.

What is the effect of the parasympathetic nervous system on the heart rate?

Stimulation of the vagus nerve will make the heart beat

Which of the following is associated with a decrease in cardiac output?

Heart is innervated by