The sliding filament model of contraction involves ________.
A) actin and myosin lengthening in order to slide past each other
B) the Z discs sliding over the myofilaments
C) actin and myosin sliding past each other and partially overlapping
D) the shortening of thick filaments so that thin filaments slide past

Question

Quizplus · Accepted Answer

The sliding filament model of contraction involves actin and myosin sliding past each other, with partial overlap, resulting in shortening of the sarcomere and muscle contraction. Option A is incorrect as actin and myosin do not lengthen during contraction. Option B is incorrect as the Z discs do not slide over myofilaments, but instead remain stationary. Option D is also incorrect as thick filaments do not shorten during contraction, but instead remain the same length while thin filaments slide past them.

The Sliding Filament Model of Contraction Involves ________