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Questions and Answers
What is the average heart rate per minute?
What is the average heart rate per minute?
- 100 beats/minute
- 120 beats/minute
- 72 beats/minute (correct)
- 60 beats/minute
What is the effect of tachycardia on inotropy?
What is the effect of tachycardia on inotropy?
- It decreases the heart rate
- It exerts a positive inotropic effect (correct)
- It has no effect on inotropy
- It exerts a negative inotropic effect
What is the mechanism of action for increased heart rate?
What is the mechanism of action for increased heart rate?
- Decreases the intracellular Ca+2 content
- Binds the contractile proteins (troponin C)
- Increases the intracellular Ca+2 content which bind the contractile proteins (troponin C) (correct)
- Has no effect on the force of contraction
