What characteristic of skeletal muscle fibers allows them to contract and move bones?
A) The presence of thick and thin myofilaments organized into sarcomeres.
B) The fibrous epimysium surrounding the fibers.
C) The rich supply of blood vessels in skeletal muscle.
D) The multinucleated structure of the fibers.
Answer (1)
The ability of skeletal muscle fibers to contract and move bones is primarily due to their structure, specifically the organization of thick and thin myofilaments into sarcomeres. This arrangement allows for effective contraction through the sliding filament mechanism. Other factors, like the multinucleated structure and blood supply, support but do not directly cause contraction. ;
