Question

Which of the following is a characteristics identifying feature of cardiac muscles?

• A. Intercalated disc
• B. Striated appearance
• C. Voluntary actions
• D. Involuntary actions

Answer 1

The correct option is A Intercalated disc

• Intercalated discs are microscopic identifying features of cardiac muscle.
• Cardiac muscle consists of individual heart muscle cells (cardiomyocytes) connected by intercalated discs to work as a single functional organ or syncytium.
• Intercalated discs support synchronized contraction of cardiac tissue. Hence, the intercalated disc is an identifying feature of cardiac muscles.

So, the correct answer is 'intercalated disc'.