The ____________ Consists of Only Actin Myofilaments

Question

The ____________ consists of only actin myofilaments.
A) A band
B) I band
C) H zone
D) M line
E) Z disk

Accepted Answer

The I band contains only actin myofilaments and is therefore the only choice that fits the description given. The A band contains both actin and myosin myofilaments, the H zone contains only myosin myofilaments, the M line provides anchorage for myosin myofilaments, and the Z disk defines the boundaries of a sarcomere and anchors the actin myofilaments.