The Contractile Unit of a Muscle is the ____

Question

The contractile unit of a muscle is the ____.  
A) sarcomere
B) myosin head
C) phosphate group
D) myofibril
E) actin filaments

Accepted Answer

The sarcomere is considered as the smallest unit of the muscle that is capable of producing contraction. It is made up of actin and myosin filaments arranged in a highly organized pattern. Within a sarcomere, the myosin heads bind to the actin filaments and work together to produce muscle contraction. Therefore, option A is the correct choice.