which statement best describes the step in muscle contraction when the sarcomere is the shortest?\nthe…
which statement best describes the step in muscle contraction when the sarcomere is the shortest?\nthe sarcomere is contracted, and the actin and myosin filaments are partially overlapped.\nthe sarcomere is relaxed, and the actin and myosin filaments are partially overlapped.\nthe sarcomere is contracted, and the actin and myosin filaments are completely overlapped.\nthe sarcomere is relaxed, and the actin and myosin filaments are completely overlapped.
Answer
Brief Explanations:
In muscle contraction, when the sarcomere is the shortest, it is in a contracted state. At this point, the thin - actin filaments and thick - myosin filaments are completely overlapped as the cross - bridges have pulled the actin filaments towards the center of the sarcomere. A relaxed sarcomere has less overlap between actin and myosin.
Answer:
The sarcomere is contracted, and the actin and myosin filaments are completely overlapped.