ANATOMY

Detailed explanation-1: -Skeletal muscle cells are long, cylindrical, multi-nucleated and striated. Skeletal muscle cells have high energy requirements, so they contain many mitochondria in order to generate sufficient ATP.

Detailed explanation-2: -Skeletal muscle fibers are made when myoblasts fuse together; muscle fibers therefore are cells with multiple nuclei, known as myonuclei, with each cell nucleus originating from a single myoblast.

Detailed explanation-3: -Skeletal muscle fibers are cylindrical, multinucleated, striated, and under voluntary control. Smooth muscle cells are spindle shaped, have a single, centrally located nucleus, and lack striations.

Detailed explanation-4: -Skeletal muscles are made of long, thin cells that are packed with highly organized proteins and organelles. During strenuous exercise, the rate of energy use in skeletal muscles can increase by more than 100-fold almost instantly. To meet this energy demand, muscle cells contain mitochondria.

Detailed explanation-5: -Muscle cells are one of the largest cell types, which are formed by fusion of mononucleated myoblasts and contain up to several tens (invertebrates) to several hundred (vertebrates) nuclei.