HSS 396 FINAL EXAM QUESTIONS
COMPLETE WITH 100% CORRECT
ANSWERS
\Q\.Depolarization - ANSWERS✔-when gated ion channels open, positively
charged cations flow into myocardial cell
*generates AP
\Q\.Repolarization - ANSWERS✔-Repolarization: follows depolarization; fast acting
K+ channels open; allows K+ efflux ~ AP back to baseline
\Q\.upward deflection of EKG - ANSWERS✔-current moving toward electrode
\Q\.downward deflection of EKG - ANSWERS✔-current moving away from
electrode
\Q\.Sinoatrial (AV) node - ANSWERS✔-*The Conduction System of the Heart*
- electrical signal originates here (60-100bpm)
o Signal depolarizes atria and passes to AV node
, \Q\.atrioventricular (AV) node - ANSWERS✔-a node of specialized heart muscle
located in the septal wall of the right atrium; receives impulses from the sinoatrial
node and transmits them to the atrioventricular bundle
\Q\.Bundle of His (AV bundle) - ANSWERS✔-located next to the AV node; provides
the transfer of the electrical impulse from the atria to the ventricles
\Q\.Right & left bundle branches - ANSWERS✔-Two pathways in interventricular
septum
Carry impulses toward apex of heart
\Q\.purkinje fibers - ANSWERS✔-specialized conductive fibers located within the
walls of the ventricles
- carry signal to myocardium
-depolarizes @ 30bpm
\Q\.P wave - ANSWERS✔-atrial depolarization
-small, rounded wave
\Q\.QRS complex - ANSWERS✔-ventricular depolarization and atrial repolarization
COMPLETE WITH 100% CORRECT
ANSWERS
\Q\.Depolarization - ANSWERS✔-when gated ion channels open, positively
charged cations flow into myocardial cell
*generates AP
\Q\.Repolarization - ANSWERS✔-Repolarization: follows depolarization; fast acting
K+ channels open; allows K+ efflux ~ AP back to baseline
\Q\.upward deflection of EKG - ANSWERS✔-current moving toward electrode
\Q\.downward deflection of EKG - ANSWERS✔-current moving away from
electrode
\Q\.Sinoatrial (AV) node - ANSWERS✔-*The Conduction System of the Heart*
- electrical signal originates here (60-100bpm)
o Signal depolarizes atria and passes to AV node
, \Q\.atrioventricular (AV) node - ANSWERS✔-a node of specialized heart muscle
located in the septal wall of the right atrium; receives impulses from the sinoatrial
node and transmits them to the atrioventricular bundle
\Q\.Bundle of His (AV bundle) - ANSWERS✔-located next to the AV node; provides
the transfer of the electrical impulse from the atria to the ventricles
\Q\.Right & left bundle branches - ANSWERS✔-Two pathways in interventricular
septum
Carry impulses toward apex of heart
\Q\.purkinje fibers - ANSWERS✔-specialized conductive fibers located within the
walls of the ventricles
- carry signal to myocardium
-depolarizes @ 30bpm
\Q\.P wave - ANSWERS✔-atrial depolarization
-small, rounded wave
\Q\.QRS complex - ANSWERS✔-ventricular depolarization and atrial repolarization
