Which Structure in the Heart Initiates Action Potentials That Stimulate

question 65

Multiple Choice

Which structure in the heart initiates action potentials that stimulate contraction of the heart at a constant rate of about 100 beats per minute?

• A)Cardiac accelerator nerves
• B)Atrioventricular node
• C)Cardiovascular center
• D)Sinoatrial node
• E)Bundle of His

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