WorksheetsHeart Function and Regulation Quiz
Total questions: 15
Worksheet time: 8mins
What is the primary effect of positive chronotropic agents on the heart?
Decrease force of contraction
Decrease heart rate
Increase force of contraction
Increase heart rate
Which of the following is a positive inotropic agent?
Calcium channel blockers
Vagus nerve
Norepinephrine
Acetylcholine
What effect does the sympathetic nervous system have on the heart?
Increases heart rate
Decreases heart rate
Increases potassium levels
Decreases contractility
Which agent is known to slow the rate of depolarization in the heart?
Thyroxine
Acetylcholine
Epinephrine
Norepinephrine
What is the effect of calcium channel blockers on the heart?
Increase calcium influx
Increase heart rate
Decrease heart rate
Increase force of contraction
Which of the following is a negative chronotropic agent?
Epinephrine
Parasympathetic nervous system
Thyroxine
Sympathetic nervous system
What role does the vagus nerve play in heart regulation?
Releases acetylcholine
Releases epinephrine
Releases thyroxine
Releases norepinephrine
Which of the following increases the force of contraction in the heart?
Vagus nerve
Calcium channel blockers
Parasympathetic nervous system
Sympathetic nervous system
What is the effect of elevated body temperature on the heart?
Increases potassium levels
Decreases heart rate
Increases heart rate
Decreases force of contraction
Which of the following is NOT a positive chronotropic agent?
Nervous system
Elevated body temperature
Calcium channel blockers
Thyroxine
What is the primary effect of the parasympathetic nervous system on the heart?
Increases force of contraction
Decreases heart rate
Increases calcium influx
Increases heart rate
Which of the following is a negative inotropic agent?
Thyroxine
Calcium channel blockers
Parasympathetic nervous system
Sympathetic nervous system
How does the sympathetic division of the ANS affect heart contractility?
Decreases potassium levels
Increases potassium levels
Increases calcium influx
Decreases calcium influx
Which of the following agents is associated with increased heart rate?
Calcium channel blockers
Acetylcholine
Norepinephrine
Vagus nerve
What is the effect of thyroxine on the heart?
Decreases heart rate
Increases heart rate
Decreases force of contraction
Increases potassium levels
