Question

Muscular tissues which function throughout the life continuously without fatigue is______________

• A. Skeletal muscle
• B. Smooth muscle
• C. Cardiac muscle
• D. Voluntary muscle

Answer 1

The correct option is C Cardiac muscle

• Cardiac muscle is a type of involuntary striated muscle found only in the walls of the heart.
• This is a specialized muscle that, while similar in some fundamental ways to smooth muscle and skeletal muscle, has a unique structure and with an ability not possessed by muscle tissue elsewhere in the body.
• Cardiac muscle, like other muscles, can contract, but it can also carry an action potential (i.e., conduct electricity), like the neurons that constitute nerves.
• Furthermore, some of the cells have the ability to generate an action potential, known as cardiac muscle automaticity. Cardiac muscle is adapted to be highly resistant to fatigue:
• it has a large number of mitochondria, enabling continuous aerobic respiration, numerous myoglobins (oxygen-storing pigment), and a good blood supply, which provides nutrients and oxygen.