Conducting System of the Heart Topic 2.2.4

Where is the sino-atrial (SA) node located?

• left ventricle

• left atrium

• right atrium

• septum

What is another name for the SA node?

• Generator

• Conductor

• Pacemaker

• Beatkeeper

Where does the electrical impulse from the sino-atrial node travel to next?

• to the muscle cells of the right and left atria, then to the atrioventricular node, then to the ventricles.

• to the atrioventricular node then to the ventricles

• to the muscle cells of the right ventricle, then to the atrioventricular node, then to the right atria.

• to the purkinje fibers, then to the atrioventricular bundle.

The SA node, the atrioventricular node, the atrioventricular bundle, conducting fibres, and Purkinje fibres are part of the ​ _______ conducting system of the heart.

• extrinsic

• sympathetic

• parasympathetic

• intrinsic

Parasympathetic nerves send signals to

• increase the heart rate

• slow the heart rate

• increase the force of the heartbeat

• stop the heart beat