Question

which of the following best describes the term z line? center of a sarcomere elastic protein of a sarcomere thin filaments are anchored here functional unit of striated muscle intercalated disc

Explanation:

• The Z - line (or Z - disk) is a structure in muscle fibers.
• Sarcomeres are the basic contractile units of muscle. The Z - line serves as the anchor point for thin filaments (actin filaments).
• The center of a sarcomere is the M - line. The elastic protein of a sarcomere is titin. The functional unit of striated muscle is the sarcomere. Intercalated discs are found in cardiac muscle and are involved in cell - to - cell communication.

Answer:

thin filaments are anchored here