Question

Read the following statements and select the correct option
Statement 1 : Cardiac muscle of the heart is striated and has intercalated discs between its fibres (cells)
Statement 2 : It provides quick, powerful and rhythmic contractions to the heart

• A. Both statements 1 and 2 are correct
• B. Statement 1 is correct but statement 2 is incorrect
• C. Statement 1 is incorrect but statement 2 is correct
• D. Both statements 1 and 2 are incorrect

Answer 1

Answer: (A)

Cardiac muscles are present in heart. Cardiac muscle tissue fibres show the characters of both striated and unstriated muscle fibres. The myofibrils have dark and light bands, thus they are striated but they are not under the control of the will of the animal, thus they are involuntary. They have intercalated discs at intervals. These discs permit the wave of muscle contraction to be transmitted from one cardiac fibre to another. This provides quick, powerful and rhythmic contractions to the heart