Question

Striped muscles have:
(a)One nucleus
(b)Many nuclei
(c)Two nuclei
(d)No nuclei

Answer 1

Hint: Striped muscles are also known as voluntary muscles. These muscles are attached to the skeleton component of the body.

Complete answer:
Striped muscle or voluntary or skeletal muscles are attached to the skeleton component of the body and are primarily involved in the locomotory actions and changes of the body posture. These are made up of fibers that are multinucleated/syncytial with the nuclei at the periphery of the cell.
When observed under a microscope, alternate light and dark bands are observed on the muscle fibers. Due to this striated appearance of muscle fibers, they are called striated or striped muscle.
These muscles are voluntary as they are under the control of consciousness.
For example: - muscles of the hindlimbs, forelimbs, tongue, pharynx, etc.

Additional information:
-Striated muscles are also known as voluntary muscle, skeletal muscles, and striped muscles.
-The muscle fibers are cylindrically shaped with blunt ends.
-The fibers are unbranched and occur in a bundle.
-These are voluntary and innervated by branches of cranial and spinal nerves and they have an abundance of blood supply.
-The intercalated disc is absent and mitochondria are present in abundance.
-They contract quickly and get easily fatigued.
-Skeletal muscles are covered by the membrane called sarcolemma which encloses sarcoplasm with many nuclei.
-The muscle fiber contains parallelly arranged myofibrils which have alternate light and dark bands.
-The dark band present on myofibril is known as A band or Anisotropic band and the light band is called I band or Isotropic band.
So, the correct answer is ‘Many nuclei’.

Note: Cardiac muscles and skeletal muscles both are striated and have alternate light and dark bands with branching. But cardiac muscle fiber is uninucleated whereas striated muscle fiber is multinucleated.