Question

which of the following is mismatched?
a actin myofilaments - thin myofilaments
b z disk - structure between adjacent sarcomeres
c i band - contains only actin
d myosin myofilaments - thin myofilaments
e m line - middle of the h zone

Explanation:

• Actin myofilaments are thin myofilaments.
• Z - disk is the structure between adjacent sarcomeres.
• I - band contains only actin.
• Myosin myofilaments are thick myofilaments, not thin.
• M - line is in the middle of the H - zone.

Answer:

D. myosin myofilaments - thin myofilaments