Question

The term that describes muscle fibrie elements (polymerized protein molecules) capable of sliding along each other, thus shortening the muscle and, if doing so against resistance generating tension is called:

A)
Muscle contraction

B)
Kinetics

C)
Free dynamics

D)
Muscle filaments

Answer 1

The term for muscle fiber elements that slide against each other to shorten the muscle is known as muscle contraction, which is based on the sliding filament theory.

Step-by-step explanation:

The term that describes muscle fiber elements capable of sliding along each other, thus shortening the muscle and generating tension when done against resistance, is called muscle contraction. This is explained by the sliding filament theory, where myosin filaments use energy from ATP to "walk" along the actin filaments.

Through repeated attachments and pullings of the thick myosin on the thin actin filaments, the filaments slide over one another, pulling the Z discs closer and shortening the sarcomere, leading to muscle contraction.