Where should the positive electrode for lead V5 be positioned? ...

[Collmarie]

Where should the positive electrode for lead V5 be positioned?
 
  a. Right side of the sternum, fourth intercostal space
  b. Left midaxillary line at the same level as V4
  c. Left side of the sternum, fourth intercostal space
  d. Left anterior axillary line at the same level as V4

Question 2

In the heart's conduction system, the _____ receive(s) an electrical impulse from the bundle of His and relay(s) it to the Purkinje fibers in the ventricular myocardium.
 
  a. atrioventricular (AV) node
  b. atria
  c. sinoatrial (SA) node
  d. right and left bundle branches

[spencer.martell]

Answer to Question 1

D
The positive electrode for lead V5 is positioned at the left anterior axillary line at the same level as V4.

Answer to Question 2

D
The right and left bundle branches divide into smaller and smaller branches and then into a special network of fibers called the Purkinje fibers. These fibers spread from the interventricular septum into the papillary muscles. They continue downward to the apex of the heart, composing an elaborate web that penetrates about one third of the way into the ventricular muscle mass. The fibers then become continuous with the muscle cells of the right and left ventricles.