In a contracted sarcomere, ____.
A)there is little overlap of actin and myosin
B)the Z lines are close together
C)the sarcomere length has increased
D)power strokes are inhibited
E)the overall muscle is relaxed

Question

Quizplus · Accepted Answer

In a contracted sarcomere, the Z lines are closer together, indicating that there is more overlap between the actin and myosin filaments. This overlap allows for the muscle to generate force and shorten in length. Choice A is incorrect because a lack of overlap between actin and myosin would result in a relaxed muscle, not a contracted one. Choice C is incorrect because a longer sarcomere length would result in a weaker contraction. Choice D is incorrect because power strokes are necessary for muscle contraction. Choice E is incorrect because a contracted sarcomere indicates an actively contracting muscle, not a relaxed one.

In a Contracted Sarcomere, ____