POST LAB ASSIGN MENTS in MasteringAP Date Lab section PART 1

POST LAB ASSIGN MENTS in MasteringA&P; Date: Lab section: PART 1. Check Your Understanding Activity 1: Recording and Interpreting an Electrocardiogram 1. Which component(s) of the cardiac conduction system: a, serves as the pacemaker? b. is the only connection between the atria and the ventricles? c. extend through the interventricular septum toward the apex of the heart? d. receives action potentials from the sinoatrial node? e. conducts action potentials from the apex of the heart to the remaining myocardium? 2. Identify the components of the electrocardiogram shown in the accompanying illustration: 3. Which component of the electrocardiogram represents: a. depolarization of the ventricles? b. the duration of ventricular contraction? c. depolarization of the atria? d. the time required for electrical impulses to travel from the SA node through the node? e. repolarization of the v n riches? f start of T deflect a n o isoelectric line 4. State two differences between a resting eie boca ogram and an electrocardiogram following vigorous exercise.

Solution

The blanks are filled as follows;

1. SA node (sinoatrial node)

2. Atrioventricular bundle

3. Atrioventricular bundle branches

4. Atrioventricular node

5. Purkinje finers