Cardiac conduction system

Question 1

What is the special name for the heart?

Answer 1

Myogenic

Question 2

How does the cardiac conduction system work?

Answer 2

1. Impulse starts in the sinoatrial node.
2. The atriums then contract, which is called the Atrial Systole
3. The impulse then reaches the atrioventricular node
   - AVN delays the impulse for 0.1 seconds
4. The impulse then travels down the Bundle of His
5. Then travels through the purkinje fibres
6. The. ventricles now contract (ventricular systole).

Question 3

What is the sympathetic nervous system?

Answer 3

Increases heart rate and myocardial contractility.

Question 4

What is the parasympathetic nervous system?

Answer 4

Releases a hormone that slows down the heart rate