Podcast
Questions and Answers
Match the following terms with their definitions in the cardiac cycle:
Match the following terms with their definitions in the cardiac cycle:
Systole = Heart contraction Diastole = Heart relaxation Cardiac cycle = One complete heartbeat lub = Closing of the semilunar valves
Match the following cardiac nodes with their functions:
Match the following cardiac nodes with their functions:
SA node = Initiates the depolarization wave AV node = Spreads the depolarization wave to the atria Atrioventricular node = The depolarization wave then spreads to the AV node Bundle branches = The wave continues on through the right and left bundle branches
Match the following cardiac events with their descriptions:
Match the following cardiac events with their descriptions:
First heart sound = Caused by the closing of the AV valves Second heart sound = Occurs when the semilunar valves close at the end of systole Atrial contraction = Caused by the depolarization wave spreading through the atrial myocardium Ventricular contraction = Caused by the depolarization wave continuing through the Purkinje fibers
Match the following cardiac structures with their functions:
Match the following cardiac structures with their functions:
Signup and view all the answers
Match the following cardiac events with their consequences:
Match the following cardiac events with their consequences:
Signup and view all the answers
Match the following cardiac structures with their locations:
Match the following cardiac structures with their locations:
Signup and view all the answers
Study Notes
Conduction System
- The depolarization wave is initiated by the sinoatrial (SA) node.
- The wave then passes through the atrial myocardium.
- The depolarization wave then spreads to the atrioventricular (AV) node, followed by atrial contraction.
- The wave then passes rapidly through the AV bundle.
- The wave continues on through the right and left bundle branches, and then to the Purkinje fibers in the ventricular walls, resulting in a contraction that ejects blood, leaving the heart.
Cardiac Cycle
- The cardiac cycle refers to the events of one complete heartbeat.
- During the cardiac cycle, both atria and ventricles contract and then relax.
- The cardiac cycle consists of systole and diastole.
Heart Contraction and Relaxation
- Systole means heart contraction.
- Diastole means heart relaxation.
Heart Sounds
- The first heart sound, “lub”, is caused by the closing of the AV valves.
- The second heart sound, “dub”, occurs when the semilunar valves close at the end of systole.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the sequence of events in the conduction system of the heart, from the sinoatrial node to the Purkinje fibers. It tests your understanding of the electrical conduction pathway in the heart.
