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ADA NBDE National Board Dental Part I

Category - NBDE

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Which of the following characteristics of cardiac muscle is not true?

contractile activity is mediated intrinsically
it contains T tubules
it does not contain troponin
each cell has one centrally located nucleus

Explanation

Answer: C - Cardiac muscle does contain troponin. Its contraction occurs via actin-linked regulation, which is dependent on calcium-troponin interactions.

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ADA NBDE National Board Dental Part I

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ADA NBDE National Board Dental Part I

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