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Questions and Answers
What is the primary factor affecting heart rate?
What is the primary factor affecting heart rate?
- Parasympathetic activity
- Autonomic nerves activity (correct)
- Decreased level of c-AMP
- Acetylcholine muscarinic receptors
Which of the following decreases the slope of phase 4 in the SA node?
Which of the following decreases the slope of phase 4 in the SA node?
- Decreased level of c-AMP
- Activation of KAch (correct)
- Increased level of c-AMP
- Increased conductance
What effect does Bradycardia have on heart rate?
What effect does Bradycardia have on heart rate?
- Has no effect on heart rate
- Can either increase or decrease heart rate depending on the cause
- Increases heart rate
- Decreases heart rate (correct)
