Question

The sliding filament model of contraction involves

a.the z disks sliding over myofilaments
b.the shortening of thick filaments so that thing filaments slide past
c.actin and myosin lengthening to slide past eachother
d.actin and myosin sliding past eachother and partially overlapping

Answer 1

The sliding filament model of contraction involves actin and myosin sliding past each other and partially overlapping. When a muscle fiber is stimulated, the myosin heads bind to actin, forming cross-bridges. The cross-bridges generate filament movement, causing the thin filaments to slide over the thick filaments and resulting in muscle contraction.

Step-by-step explanation:

The sliding filament model of contraction involves actin and myosin sliding past each other and partially overlapping. When a muscle fiber is stimulated, the myosin heads bind to actin, forming cross-bridges. The cross-bridges generate filament movement, causing the thin filaments to slide over the thick filaments and resulting in muscle contraction.