Match the bands, labelled a. through c., with the descriptions. (Options may be used more than once or not at all.)
-composed of thin filaments only

Question

Quizplus · Accepted Answer

The I band in muscle fibers is composed of thin filaments only, which are primarily actin filaments. This contrasts with the A band, which contains both thick (myosin) and thin filaments, and the H zone, which contains thick filaments only.

Match the Bands, Labelled A