Question

Striped muscles fibers has
A. Many nuclei
B. Two nuclei
C. No nuclei
D. One nuclei

Answer 1

Hint: Muscle is the special type of tissue found in the animal body.
Its primary functions as a source of power. It is responsible for moving extremities and external areas of the body known as “skeletal muscle”. Heart muscle is known as “Cardiac muscle”. Muscle that is in the walls of arteries and bowel is known as smooth muscles.

Complete answer:
- Muscle: It is a specialized tissue of mesodermal in origin.
- They have special properties like excitability, contractility, extensibility and elasticity.
- The 3 types of muscle tissue are cardiac, smooth, and skeletal muscle.
- Skeletal muscle is also called striated or striped muscle because of the striations created by light and dark parts of the muscle fibers.
- Skeletal muscles are voluntary muscles which mean we can actively control its function.
- Most skeletal muscles are attached to bones by tendons.
- These types of muscles are, tubular, multinucleated and unbranched.
- These muscles generate heat by their contraction.
- Striated muscle is skeletal muscle cells like muscle fibers.
- These are elongated or tubular and they have multiple nuclei which are located on the periphery of the cell.
- Smooth muscles are spindle-shaped with a single nucleus.
- These muscles are non-striated, spindle shaped and uninucleate.
 -Cardiac muscle is also an involuntary muscle but is more akin in structure to skeletal muscle, and is found only in the heart.

Hence, the correct answer is option (A).

Note: Visceral muscles are situated in the inner walls of hollow visceral organs of the body like alimentary canal, reproductive tract etc. They do not exhibit any striations and are smooth in appearance that is why they are called smooth muscle or non striated muscle. Their activity is not under voluntary control of the nervous system and that’s why it is known as involuntary muscle.