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AP Lab Quarter 3 Quiz 1
AP Lab Quarter 3 Quiz 1
7
Anatomy
Undergraduate 3
04/07/2011

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Cards

Term
What does the p-wave represent? What is happening in the heart at this point as a result?
Definition
Atrial depolarization

The atria are constricting and pumping blood into the ventricles.
Term
What does the QRS complex represent?
Definition
Ventricular Depolarization

The ventricles are constricting and pumping blood to the lungs from the right ventricle (pulmonary circulation), and to the rest of the body in the left ventricle (via aorta)
Term
Why is atrial repolarization not seen on an ECG?
Definition
It is masked by (happens at the same time as) the QRS complex
Term
What does the T wave represent?
Definition
Ventricular Repolarization
Term
What does ECG stand for and why is it sometimes called an EKG?
Definition
ECG stands for electrocardiogram, and the abbreviation EKG is due to the ECG being invented in Germany where cardio is spelled with a K (kardio).
Term
What is the normal path of action potential conduction? (6)
Definition
SA node→ atrial muscle → AV node→ bundles of His → purkinje fibers → ventricular muscle
Term
What are the two nodes of the heart?
Definition
Sinoatrial Node (SA-Node): Pacemaker Located in the Posterior Wall of the Right Atrium

Atrioventricular Node (AV-Node): Mass of Conducting Fibers Between The Atria And Ventricles
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