_____ is the ability of cardiac cells to spontaneously initiate ...

[bobbie]

_____ is the ability of cardiac cells to spontaneously initiate an electrical impulse without being stimulated from another source.
 
  Fill in the blanks with correct word

Question 2

What factors affect stroke volume?
 
  What will be an ideal response?

[leeeep]

Answer to Question 1

Automaticity

Answer to Question 2

Stroke volume is determined by the degree of ventricular filling when the heart is relaxed (preload), the pressure against which the ventricle must pump (afterload), and the myocardium's contractile state (contracting or relaxing).

[bobbie]

Thanks for the timely response, appreciate it

[zacnyjessica]

Gracias!