For Cardiac muscle list the # and location of nuclei, is it striated, is it voluntary

• A. One centrally located nucleus, striated, not voluntary
• B. One centrally located nucleus, not striated, involuntary
• C. Multiple peripherally located nuclei, striated, voluntary
• D. One centrally located nucleus, striated, voluntary

Answer: (A)

Cardiac muscle cells, or cardiomyocytes, typically have a single nucleus located in the center of the cell. They are striated due to the organized sarcomeres, and their contraction is involuntary, controlled by the autonomic nervous system and the heart’s intrinsic conduction system. The combination of a central single nucleus, striations, and involuntary control best matches the description. (Some cells can be binucleate, but that is not the common rule for cardiac muscle.)