Question

Choose the correct statements from the following with respect to the muscular tissues.

• A. Muscles present in the iris of eyes are striated.
• B. Cardiac muscles are voluntary.
• C. Cardiac muscles have striations.
• D. Unstriated muscles are involuntary.

Answer 1

Answer: (C), (D)

The correct options are
C Cardiac muscles have striations.
D Unstriated muscles are involuntary.

• Muscles present in the iris of eyes are smooth muscles. These are unstriated muscles. They have long pointed ends and are uninucleated.
• Cardiac muscles are involuntary. They cannot be controlled by will.
• Cardiac muscles are made up of elongated fibres. They have alternate light and dark bands or striations similar to the skeletal muscles.
• Unstriated muscles or smooth muscles are involuntary. They are present in the inner linings of intestine, stomach, blood vessels, etc.