Which feature distinguishes cardiac muscle from skeletal muscle?
Correct answer: B. It is involuntary and has intercalated discs
- A. It is voluntary and lacks striations
- B. It is involuntary and has intercalated discs
- C. It has no actin or myosin filaments
- D. It is found mainly in the walls of the intestine
Explanation
Cardiac muscle is involuntary, striated and contains intercalated discs that help coordinate contraction. Skeletal muscle is voluntary, while smooth muscle is found in structures such as the intestine.
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