Sinoatrial Node

Question 1

Location

Answer 1

Posterior wall fo the right atrium near entrance of svc

Question 2

Natural pacemaker

Answer 2

Establishes basic rhythm and rate of the heartbeat

Question 3

Electrical impulses from the sa node start each wave of _______ in the heart

Answer 3

Muscle contraction

Question 4

The impulse in the _____ spreads over the muscles in both atria, causing them to contract simultaneously, forcing blood into the ventricles

Answer 4

Right atrium

Question 5

Atrioventricular node

Answer 5

Located on the floor of the right atrium near the interatrial septum, transmits the electrical impulses onward to the bundle of His

Question 6

Bundle of his

Answer 6

Group of fibers located within the interventricular septum, carry an electrical impulse to ensure the sequence of heart contractions

Question 7

Purkinje fibers

Answer 7

Specialized conductive fibers located within the walls of the ventricles, relay the electrical impulses to the cells of the ventricles, causes the ventricles to contract, forces blood out of the heart and into the aorta and pulmonary arteries