Question 1
A slower than normal heart rate is called
◦ tachycardia.
◦ bradycardia.
◦ hypocardia.
◦ hypercardia.
◦ hypothermia.
Question 2
An artificial pacemaker supplements the actions of
◦ sympathetic nerves.
◦ the atrioventricular node.
◦ the medulla oblongata.
◦ the sinoatrial node.
◦ the heart muscle itself.