Question 1
After the sinus node initiates an impulse, where does the impulse go next?
◦ Interatrial tracts
◦ Purkinje fibers
◦ Bundle branches
◦ Ventricular tissue
Question 2
Which of the following characteristics of heart cells is mechanical?
◦ Excitability
◦ Automaticity
◦ Contractility
◦ Conductivity