An Autorhythmic Heart Cell Is One in Which

question 112

Multiple Choice

An autorhythmic heart cell is one in which

• A) action potentials fire spontaneously.
• B) action potentials are stimulated by internal stores of acetylcholine.
• C) action potentials always occur at exactly the same frequency.
• D) all filaments contract and relax with a high degree of synchrony.
• E) action potentials are initiated by the autonomic nervous system.

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