ANATOMY

Detailed explanation-1: -Skeletal muscles and cardiac muscles are called striated muscles due to the presence of alternate dark and light bands. When stained, this arrangement is visible as light and dark bands under the microscope. Hence, striations appear on striped muscles. Therefore, option A is correct.

Detailed explanation-2: -The striated appearance of skeletal muscle tissue is a result of repeating bands of the proteins actin and myosin that are present along the length of myofibrils. Dark A bands and light I bands repeat along myofibrils, and the alignment of myofibrils in the cell causes the entire cell to appear striated or banded.

Detailed explanation-3: -Skeletal muscle fibers occur in muscles which are attached to the skeleton. They are striated in appearance and are under voluntary control.

Detailed explanation-4: -These are called the I Bands. The dark bands are the striations seen with the light microscope. When a muscle contracts the light I bands disappear and the dark A bands move closer together. This is due to the sliding of the myofilaments against one another.

Detailed explanation-5: -Which is true of the light bands in skeletal muscle? They are called I bands and are bisected by a Z disc.