The H zone
A) contains only myosin myofilaments.
B) contains only actin myofilaments.
C) contains both myosin and actin myofilaments.

Name: The H zone A) contains only myosin myofilaments. B) contains only actin myofilaments. C) contains both myosin and actin myofilaments.
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Question

Quizplus · Accepted Answer

The H zone of a sarcomere in muscle fibers contains only myosin myofilaments, not actin myofilaments. This zone appears lighter under a microscope and shortens during muscle contraction.

The H Zone