Question

Read the following statements and find out the incorrect statement.
A. About $45-50\%$ of the body weight of a human adult is contributed by muscles.
B. Muscles have special properties like excitability, contractility, extensibility and elasticity.
C. Based on their location, three types of muscles are identified: skeletal, smooth and cardiac.
D. Based on appearance, cardiac muscles are striated. They are involuntary in nature as the nervous system does not control their activity directly.

• A. B & C
• B. A & C
• C. Only A
• D. A & D

Answer 1

The correct option is A B & C

1. A major bulk of body weight; 45−50% is contributed by muscles.

2. All muscle cells share four primary properties that distinguish them from other cells : excitability, contractility, extensibility and elasticity.

3. Based on their location, three types of muscles are identified: skeletal, smooth and cardiac.

4. Cardiac muscles are striated in appearance and myogenic in nature.

So, none of the given options are incorrect.