3. Which of the following is not correct regarding aprepotential:
- it is a spontaneous depolarization
- it occurs as the result of the influx of Ca2+ via L-typechannels
- it is due to \"funny\" current
- the # of prepotentials per minute = HR
4. What would happen if you injected a drug into the papillarymuscle that caused it to relax during systole (ventricularcontraction)?
- blood would flow from the atria into the ventricles
- the tension of the chordae tendineae would increase
- the ventricles would relax
- the seal of the AV valves would be compromised
