cardiac conduction system & regulation of cardiac cycle

Question 1

What is the cardiac conduction system?

Answer 1

specialized cardiac muscle tissue which conducts impulses

Question 2

What is the sinoatrial (SA) node?

Answer 2

“pacemaker”, generates rhythmic impulses which spread through the myocardium

Question 3

What are the junctional fibers?

Answer 3

carries impulses into the atrioventricular (AV) node

Question 4

What is the atrioventricular (AV) node?

Answer 4

conducts impulses from the atria through the septum, to the ventricles

Question 5

What is the AV bundle of His?

Answer 5

within the inter-ventricular septum, right and left branch transmits impulse to the walls of ventricles

Question 6

What are Purkinje fibers?

Answer 6

branch throughout walls of the ventricles and carry impulse rapidly, stimulating contraction

Question 7

What is the regulation of the cardiac cycle controlled by?

Answer 7

controlled by the cardiac center within the medulla oblongota

Question 8

How does the heart maintain homeostasis?

Answer 8

increases or decreases heart rate in response to changes in state

Question 9

Can your heart continue to beat if your cerebrum is not functioning?

Answer 9

if the motor cortex in the cerebrum is not functioning, the heart will not beat