character: Dr. Michael Rogers
topic: How Heart Muscles Contract in Response to Nerve Signals
grade: 11
subject: Science
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character: Dr. Sarah Klein
topic: The Role of Calcium in Cardiac Muscle Contraction
grade: 11
subject: Science
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character: Professor Alan Smith
topic: The Electrical Conduction System of the Heart
grade: 11
subject: Science
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character: Dr. Emily Chen
topic: Neurotransmitters and their Effects on Heart Rate
grade: 11
subject: Science
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