Which letter is associated with the line that is a thin protein structure in the center of a band and serves as an attachment site for thin filament ends?
A)I
B)A
C)Z
D)M
E)H

Question

Quizplus · Accepted Answer

The Z line is a thin protein structure in the center of a band and serves as an attachment site for thin filament ends. Choice A refers to the area in a sarcomere where there is only thick filaments present, while choice B refers to the area where there is both thick and thin filaments present in a sarcomere. Choice D refers to the line in the center of the A band which separates the light and dark regions of the band while choice E is not a recognized letter in sarcomere structure.

Which Letter Is Associated with the Line That Is a Thin