What term is used to define the ability of certain cardiac cells ...

[RYAN BANYAN]

What term is used to define the ability of certain cardiac cells to depolarize without stimulation?
 
  a. Automaticity
  b. Polarization
  c. Contraction
  d. Autopolarization

Question 2

At what part of the cardiac conduction system does the electrical impulse travel most rapidly?
 
  a. Bundle of His
  b. Bundle branches
  c. Intraatrial pathways
  d. Purkinje fibers

[upturnedfurball]

Answer to Question 1

ANS: A
The ability of these cells to depolarize without stimulations is known as automaticity.

Answer to Question 2

ANS: D
The impulse travels the most rapidly in the Purkinje fibers, which is essential if contraction of the ventricles is to occur in a coordinated fashion.