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Question

The contraction of which muscle is involuntary, vigorous and rhythmic?
  1. Striated muscles
  2. Cardiac muscles
  3. Unstriated muscles
  4. None of the above

A
Striated muscles
B
Cardiac muscles
C
None of the above
D
Unstriated muscles
Solution
Verified by Toppr

Cardiac muscles are the muscles of the heart. They are self-contracting, autonomically regulated (meaning involuntary) and must continue to contract in a rhythmic fashion for the whole life of the organism.
Thus, the correct answer is option (B), 'Cardiac muscles'.

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